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1wheel/README.md

Created August 14, 2017 18:26
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README.md
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/**
* @license
* lodash <https://lodash.com/>
* Copyright JS Foundation and other contributors <https://js.foundation/>
* Released under MIT license <https://lodash.com/license>
* Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
* Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
*/
;(function() {
/** Used as a safe reference for `undefined` in pre-ES5 environments. */
var undefined;
/** Used as the semantic version number. */
var VERSION = '4.16.6';
/** Used as the size to enable large array optimizations. */
var LARGE_ARRAY_SIZE = 200;
/** Error message constants. */
var CORE_ERROR_TEXT = 'Unsupported core-js use. Try https://github.com/es-shims.',
FUNC_ERROR_TEXT = 'Expected a function';
/** Used to stand-in for `undefined` hash values. */
var HASH_UNDEFINED = '__lodash_hash_undefined__';
/** Used as the maximum memoize cache size. */
var MAX_MEMOIZE_SIZE = 500;
/** Used as the internal argument placeholder. */
var PLACEHOLDER = '__lodash_placeholder__';
/** Used to compose bitmasks for function metadata. */
var BIND_FLAG = 1,
BIND_KEY_FLAG = 2,
CURRY_BOUND_FLAG = 4,
CURRY_FLAG = 8,
CURRY_RIGHT_FLAG = 16,
PARTIAL_FLAG = 32,
PARTIAL_RIGHT_FLAG = 64,
ARY_FLAG = 128,
REARG_FLAG = 256,
FLIP_FLAG = 512;
/** Used to compose bitmasks for comparison styles. */
var UNORDERED_COMPARE_FLAG = 1,
PARTIAL_COMPARE_FLAG = 2;
/** Used as default options for `_.truncate`. */
var DEFAULT_TRUNC_LENGTH = 30,
DEFAULT_TRUNC_OMISSION = '...';
/** Used to detect hot functions by number of calls within a span of milliseconds. */
var HOT_COUNT = 800,
HOT_SPAN = 16;
/** Used to indicate the type of lazy iteratees. */
var LAZY_FILTER_FLAG = 1,
LAZY_MAP_FLAG = 2,
LAZY_WHILE_FLAG = 3;
/** Used as references for various `Number` constants. */
var INFINITY = 1 / 0,
MAX_SAFE_INTEGER = 9007199254740991,
MAX_INTEGER = 1.7976931348623157e+308,
NAN = 0 / 0;
/** Used as references for the maximum length and index of an array. */
var MAX_ARRAY_LENGTH = 4294967295,
MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1,
HALF_MAX_ARRAY_LENGTH = MAX_ARRAY_LENGTH >>> 1;
/** Used to associate wrap methods with their bit flags. */
var wrapFlags = [
['ary', ARY_FLAG],
['bind', BIND_FLAG],
['bindKey', BIND_KEY_FLAG],
['curry', CURRY_FLAG],
['curryRight', CURRY_RIGHT_FLAG],
['flip', FLIP_FLAG],
['partial', PARTIAL_FLAG],
['partialRight', PARTIAL_RIGHT_FLAG],
['rearg', REARG_FLAG]
];
/** `Object#toString` result references. */
var argsTag = '[object Arguments]',
arrayTag = '[object Array]',
asyncTag = '[object AsyncFunction]',
boolTag = '[object Boolean]',
dateTag = '[object Date]',
domExcTag = '[object DOMException]',
errorTag = '[object Error]',
funcTag = '[object Function]',
genTag = '[object GeneratorFunction]',
mapTag = '[object Map]',
numberTag = '[object Number]',
nullTag = '[object Null]',
objectTag = '[object Object]',
promiseTag = '[object Promise]',
proxyTag = '[object Proxy]',
regexpTag = '[object RegExp]',
setTag = '[object Set]',
stringTag = '[object String]',
symbolTag = '[object Symbol]',
undefinedTag = '[object Undefined]',
weakMapTag = '[object WeakMap]',
weakSetTag = '[object WeakSet]';
var arrayBufferTag = '[object ArrayBuffer]',
dataViewTag = '[object DataView]',
float32Tag = '[object Float32Array]',
float64Tag = '[object Float64Array]',
int8Tag = '[object Int8Array]',
int16Tag = '[object Int16Array]',
int32Tag = '[object Int32Array]',
uint8Tag = '[object Uint8Array]',
uint8ClampedTag = '[object Uint8ClampedArray]',
uint16Tag = '[object Uint16Array]',
uint32Tag = '[object Uint32Array]';
/** Used to match empty string literals in compiled template source. */
var reEmptyStringLeading = /\b__p \+= '';/g,
reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;
/** Used to match HTML entities and HTML characters. */
var reEscapedHtml = /&(?:amp|lt|gt|quot|#39);/g,
reUnescapedHtml = /[&<>"']/g,
reHasEscapedHtml = RegExp(reEscapedHtml.source),
reHasUnescapedHtml = RegExp(reUnescapedHtml.source);
/** Used to match template delimiters. */
var reEscape = /<%-([\s\S]+?)%>/g,
reEvaluate = /<%([\s\S]+?)%>/g,
reInterpolate = /<%=([\s\S]+?)%>/g;
/** Used to match property names within property paths. */
var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
reIsPlainProp = /^\w*$/,
reLeadingDot = /^\./,
rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|$))/g;
/**
* Used to match `RegExp`
* [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
*/
var reRegExpChar = /[\\^$.*+?()[\]{}|]/g,
reHasRegExpChar = RegExp(reRegExpChar.source);
/** Used to match leading and trailing whitespace. */
var reTrim = /^\s+|\s+$/g,
reTrimStart = /^\s+/,
reTrimEnd = /\s+$/;
/** Used to match wrap detail comments. */
var reWrapComment = /\{(?:\n\/\* \[wrapped with .+\] \*\/)?\n?/,
reWrapDetails = /\{\n\/\* \[wrapped with (.+)\] \*/,
reSplitDetails = /,? & /;
/** Used to match words composed of alphanumeric characters. */
var reAsciiWord = /[^\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f]+/g;
/** Used to match backslashes in property paths. */
var reEscapeChar = /\\(\\)?/g;
/**
* Used to match
* [ES template delimiters](http://ecma-international.org/ecma-262/7.0/#sec-template-literal-lexical-components).
*/
var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;
/** Used to match `RegExp` flags from their coerced string values. */
var reFlags = /\w*$/;
/** Used to detect bad signed hexadecimal string values. */
var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
/** Used to detect binary string values. */
var reIsBinary = /^0b[01]+$/i;
/** Used to detect host constructors (Safari). */
var reIsHostCtor = /^\[object .+?Constructor\]$/;
/** Used to detect octal string values. */
var reIsOctal = /^0o[0-7]+$/i;
/** Used to detect unsigned integer values. */
var reIsUint = /^(?:0|[1-9]\d*)$/;
/** Used to match Latin Unicode letters (excluding mathematical operators). */
var reLatin = /[\xc0-\xd6\xd8-\xf6\xf8-\xff\u0100-\u017f]/g;
/** Used to ensure capturing order of template delimiters. */
var reNoMatch = /($^)/;
/** Used to match unescaped characters in compiled string literals. */
var reUnescapedString = /['\n\r\u2028\u2029\\]/g;
/** Used to compose unicode character classes. */
var rsAstralRange = '\\ud800-\\udfff',
rsComboMarksRange = '\\u0300-\\u036f\\ufe20-\\ufe23',
rsComboSymbolsRange = '\\u20d0-\\u20f0',
rsDingbatRange = '\\u2700-\\u27bf',
rsLowerRange = 'a-z\\xdf-\\xf6\\xf8-\\xff',
rsMathOpRange = '\\xac\\xb1\\xd7\\xf7',
rsNonCharRange = '\\x00-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\xbf',
rsPunctuationRange = '\\u2000-\\u206f',
rsSpaceRange = ' \\t\\x0b\\f\\xa0\\ufeff\\n\\r\\u2028\\u2029\\u1680\\u180e\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200a\\u202f\\u205f\\u3000',
rsUpperRange = 'A-Z\\xc0-\\xd6\\xd8-\\xde',
rsVarRange = '\\ufe0e\\ufe0f',
rsBreakRange = rsMathOpRange + rsNonCharRange + rsPunctuationRange + rsSpaceRange;
/** Used to compose unicode capture groups. */
var rsApos = "['\u2019]",
rsAstral = '[' + rsAstralRange + ']',
rsBreak = '[' + rsBreakRange + ']',
rsCombo = '[' + rsComboMarksRange + rsComboSymbolsRange + ']',
rsDigits = '\\d+',
rsDingbat = '[' + rsDingbatRange + ']',
rsLower = '[' + rsLowerRange + ']',
rsMisc = '[^' + rsAstralRange + rsBreakRange + rsDigits + rsDingbatRange + rsLowerRange + rsUpperRange + ']',
rsFitz = '\\ud83c[\\udffb-\\udfff]',
rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
rsNonAstral = '[^' + rsAstralRange + ']',
rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}',
rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]',
rsUpper = '[' + rsUpperRange + ']',
rsZWJ = '\\u200d';
/** Used to compose unicode regexes. */
var rsMiscLower = '(?:' + rsLower + '|' + rsMisc + ')',
rsMiscUpper = '(?:' + rsUpper + '|' + rsMisc + ')',
rsOptContrLower = '(?:' + rsApos + '(?:d|ll|m|re|s|t|ve))?',
rsOptContrUpper = '(?:' + rsApos + '(?:D|LL|M|RE|S|T|VE))?',
reOptMod = rsModifier + '?',
rsOptVar = '[' + rsVarRange + ']?',
rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
rsOrdLower = '\\d*(?:(?:1st|2nd|3rd|(?![123])\\dth)\\b)',
rsOrdUpper = '\\d*(?:(?:1ST|2ND|3RD|(?![123])\\dTH)\\b)',
rsSeq = rsOptVar + reOptMod + rsOptJoin,
rsEmoji = '(?:' + [rsDingbat, rsRegional, rsSurrPair].join('|') + ')' + rsSeq,
rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';
/** Used to match apostrophes. */
var reApos = RegExp(rsApos, 'g');
/**
* Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks) and
* [combining diacritical marks for symbols](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols).
*/
var reComboMark = RegExp(rsCombo, 'g');
/** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');
/** Used to match complex or compound words. */
var reUnicodeWord = RegExp([
rsUpper + '?' + rsLower + '+' + rsOptContrLower + '(?=' + [rsBreak, rsUpper, '$'].join('|') + ')',
rsMiscUpper + '+' + rsOptContrUpper + '(?=' + [rsBreak, rsUpper + rsMiscLower, '$'].join('|') + ')',
rsUpper + '?' + rsMiscLower + '+' + rsOptContrLower,
rsUpper + '+' + rsOptContrUpper,
rsOrdUpper,
rsOrdLower,
rsDigits,
rsEmoji
].join('|'), 'g');
/** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */
var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange + rsComboMarksRange + rsComboSymbolsRange + rsVarRange + ']');
/** Used to detect strings that need a more robust regexp to match words. */
var reHasUnicodeWord = /[a-z][A-Z]|[A-Z]{2,}[a-z]|[0-9][a-zA-Z]|[a-zA-Z][0-9]|[^a-zA-Z0-9 ]/;
/** Used to assign default `context` object properties. */
var contextProps = [
'Array', 'Buffer', 'DataView', 'Date', 'Error', 'Float32Array', 'Float64Array',
'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Map', 'Math', 'Object',
'Promise', 'RegExp', 'Set', 'String', 'Symbol', 'TypeError', 'Uint8Array',
'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'WeakMap',
'_', 'clearTimeout', 'isFinite', 'parseInt', 'setTimeout'
];
/** Used to make template sourceURLs easier to identify. */
var templateCounter = -1;
/** Used to identify `toStringTag` values of typed arrays. */
var typedArrayTags = {};
typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
typedArrayTags[uint32Tag] = true;
typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
typedArrayTags[errorTag] = typedArrayTags[funcTag] =
typedArrayTags[mapTag] = typedArrayTags[numberTag] =
typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
typedArrayTags[setTag] = typedArrayTags[stringTag] =
typedArrayTags[weakMapTag] = false;
/** Used to identify `toStringTag` values supported by `_.clone`. */
var cloneableTags = {};
cloneableTags[argsTag] = cloneableTags[arrayTag] =
cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =
cloneableTags[boolTag] = cloneableTags[dateTag] =
cloneableTags[float32Tag] = cloneableTags[float64Tag] =
cloneableTags[int8Tag] = cloneableTags[int16Tag] =
cloneableTags[int32Tag] = cloneableTags[mapTag] =
cloneableTags[numberTag] = cloneableTags[objectTag] =
cloneableTags[regexpTag] = cloneableTags[setTag] =
cloneableTags[stringTag] = cloneableTags[symbolTag] =
cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =
cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
cloneableTags[errorTag] = cloneableTags[funcTag] =
cloneableTags[weakMapTag] = false;
/** Used to map Latin Unicode letters to basic Latin letters. */
var deburredLetters = {
// Latin-1 Supplement block.
'\xc0': 'A', '\xc1': 'A', '\xc2': 'A', '\xc3': 'A', '\xc4': 'A', '\xc5': 'A',
'\xe0': 'a', '\xe1': 'a', '\xe2': 'a', '\xe3': 'a', '\xe4': 'a', '\xe5': 'a',
'\xc7': 'C', '\xe7': 'c',
'\xd0': 'D', '\xf0': 'd',
'\xc8': 'E', '\xc9': 'E', '\xca': 'E', '\xcb': 'E',
'\xe8': 'e', '\xe9': 'e', '\xea': 'e', '\xeb': 'e',
'\xcc': 'I', '\xcd': 'I', '\xce': 'I', '\xcf': 'I',
'\xec': 'i', '\xed': 'i', '\xee': 'i', '\xef': 'i',
'\xd1': 'N', '\xf1': 'n',
'\xd2': 'O', '\xd3': 'O', '\xd4': 'O', '\xd5': 'O', '\xd6': 'O', '\xd8': 'O',
'\xf2': 'o', '\xf3': 'o', '\xf4': 'o', '\xf5': 'o', '\xf6': 'o', '\xf8': 'o',
'\xd9': 'U', '\xda': 'U', '\xdb': 'U', '\xdc': 'U',
'\xf9': 'u', '\xfa': 'u', '\xfb': 'u', '\xfc': 'u',
'\xdd': 'Y', '\xfd': 'y', '\xff': 'y',
'\xc6': 'Ae', '\xe6': 'ae',
'\xde': 'Th', '\xfe': 'th',
'\xdf': 'ss',
// Latin Extended-A block.
'\u0100': 'A', '\u0102': 'A', '\u0104': 'A',
'\u0101': 'a', '\u0103': 'a', '\u0105': 'a',
'\u0106': 'C', '\u0108': 'C', '\u010a': 'C', '\u010c': 'C',
'\u0107': 'c', '\u0109': 'c', '\u010b': 'c', '\u010d': 'c',
'\u010e': 'D', '\u0110': 'D', '\u010f': 'd', '\u0111': 'd',
'\u0112': 'E', '\u0114': 'E', '\u0116': 'E', '\u0118': 'E', '\u011a': 'E',
'\u0113': 'e', '\u0115': 'e', '\u0117': 'e', '\u0119': 'e', '\u011b': 'e',
'\u011c': 'G', '\u011e': 'G', '\u0120': 'G', '\u0122': 'G',
'\u011d': 'g', '\u011f': 'g', '\u0121': 'g', '\u0123': 'g',
'\u0124': 'H', '\u0126': 'H', '\u0125': 'h', '\u0127': 'h',
'\u0128': 'I', '\u012a': 'I', '\u012c': 'I', '\u012e': 'I', '\u0130': 'I',
'\u0129': 'i', '\u012b': 'i', '\u012d': 'i', '\u012f': 'i', '\u0131': 'i',
'\u0134': 'J', '\u0135': 'j',
'\u0136': 'K', '\u0137': 'k', '\u0138': 'k',
'\u0139': 'L', '\u013b': 'L', '\u013d': 'L', '\u013f': 'L', '\u0141': 'L',
'\u013a': 'l', '\u013c': 'l', '\u013e': 'l', '\u0140': 'l', '\u0142': 'l',
'\u0143': 'N', '\u0145': 'N', '\u0147': 'N', '\u014a': 'N',
'\u0144': 'n', '\u0146': 'n', '\u0148': 'n', '\u014b': 'n',
'\u014c': 'O', '\u014e': 'O', '\u0150': 'O',
'\u014d': 'o', '\u014f': 'o', '\u0151': 'o',
'\u0154': 'R', '\u0156': 'R', '\u0158': 'R',
'\u0155': 'r', '\u0157': 'r', '\u0159': 'r',
'\u015a': 'S', '\u015c': 'S', '\u015e': 'S', '\u0160': 'S',
'\u015b': 's', '\u015d': 's', '\u015f': 's', '\u0161': 's',
'\u0162': 'T', '\u0164': 'T', '\u0166': 'T',
'\u0163': 't', '\u0165': 't', '\u0167': 't',
'\u0168': 'U', '\u016a': 'U', '\u016c': 'U', '\u016e': 'U', '\u0170': 'U', '\u0172': 'U',
'\u0169': 'u', '\u016b': 'u', '\u016d': 'u', '\u016f': 'u', '\u0171': 'u', '\u0173': 'u',
'\u0174': 'W', '\u0175': 'w',
'\u0176': 'Y', '\u0177': 'y', '\u0178': 'Y',
'\u0179': 'Z', '\u017b': 'Z', '\u017d': 'Z',
'\u017a': 'z', '\u017c': 'z', '\u017e': 'z',
'\u0132': 'IJ', '\u0133': 'ij',
'\u0152': 'Oe', '\u0153': 'oe',
'\u0149': "'n", '\u017f': 's'
};
/** Used to map characters to HTML entities. */
var htmlEscapes = {
'&': '&amp;',
'<': '&lt;',
'>': '&gt;',
'"': '&quot;',
"'": '&#39;'
};
/** Used to map HTML entities to characters. */
var htmlUnescapes = {
'&amp;': '&',
'&lt;': '<',
'&gt;': '>',
'&quot;': '"',
'&#39;': "'"
};
/** Used to escape characters for inclusion in compiled string literals. */
var stringEscapes = {
'\\': '\\',
"'": "'",
'\n': 'n',
'\r': 'r',
'\u2028': 'u2028',
'\u2029': 'u2029'
};
/** Built-in method references without a dependency on `root`. */
var freeParseFloat = parseFloat,
freeParseInt = parseInt;
/** Detect free variable `global` from Node.js. */
var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
/** Detect free variable `self`. */
var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
/** Used as a reference to the global object. */
var root = freeGlobal || freeSelf || Function('return this')();
/** Detect free variable `exports`. */
var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;
/** Detect free variable `module`. */
var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;
/** Detect the popular CommonJS extension `module.exports`. */
var moduleExports = freeModule && freeModule.exports === freeExports;
/** Detect free variable `process` from Node.js. */
var freeProcess = moduleExports && freeGlobal.process;
/** Used to access faster Node.js helpers. */
var nodeUtil = (function() {
try {
return freeProcess && freeProcess.binding('util');
} catch (e) {}
}());
/* Node.js helper references. */
var nodeIsArrayBuffer = nodeUtil && nodeUtil.isArrayBuffer,
nodeIsDate = nodeUtil && nodeUtil.isDate,
nodeIsMap = nodeUtil && nodeUtil.isMap,
nodeIsRegExp = nodeUtil && nodeUtil.isRegExp,
nodeIsSet = nodeUtil && nodeUtil.isSet,
nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
/*--------------------------------------------------------------------------*/
/**
* Adds the key-value `pair` to `map`.
*
* @private
* @param {Object} map The map to modify.
* @param {Array} pair The key-value pair to add.
* @returns {Object} Returns `map`.
*/
function addMapEntry(map, pair) {
// Don't return `map.set` because it's not chainable in IE 11.
map.set(pair[0], pair[1]);
return map;
}
/**
* Adds `value` to `set`.
*
* @private
* @param {Object} set The set to modify.
* @param {*} value The value to add.
* @returns {Object} Returns `set`.
*/
function addSetEntry(set, value) {
// Don't return `set.add` because it's not chainable in IE 11.
set.add(value);
return set;
}
/**
* A faster alternative to `Function#apply`, this function invokes `func`
* with the `this` binding of `thisArg` and the arguments of `args`.
*
* @private
* @param {Function} func The function to invoke.
* @param {*} thisArg The `this` binding of `func`.
* @param {Array} args The arguments to invoke `func` with.
* @returns {*} Returns the result of `func`.
*/
function apply(func, thisArg, args) {
switch (args.length) {
case 0: return func.call(thisArg);
case 1: return func.call(thisArg, args[0]);
case 2: return func.call(thisArg, args[0], args[1]);
case 3: return func.call(thisArg, args[0], args[1], args[2]);
}
return func.apply(thisArg, args);
}
/**
* A specialized version of `baseAggregator` for arrays.
*
* @private
* @param {Array} [array] The array to iterate over.
* @param {Function} setter The function to set `accumulator` values.
* @param {Function} iteratee The iteratee to transform keys.
* @param {Object} accumulator The initial aggregated object.
* @returns {Function} Returns `accumulator`.
*/
function arrayAggregator(array, setter, iteratee, accumulator) {
var index = -1,
length = array == null ? 0 : array.length;
while (++index < length) {
var value = array[index];
setter(accumulator, value, iteratee(value), array);
}
return accumulator;
}
/**
* A specialized version of `_.forEach` for arrays without support for
* iteratee shorthands.
*
* @private
* @param {Array} [array] The array to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @returns {Array} Returns `array`.
*/
function arrayEach(array, iteratee) {
var index = -1,
length = array == null ? 0 : array.length;
while (++index < length) {
if (iteratee(array[index], index, array) === false) {
break;
}
}
return array;
}
/**
* A specialized version of `_.forEachRight` for arrays without support for
* iteratee shorthands.
*
* @private
* @param {Array} [array] The array to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @returns {Array} Returns `array`.
*/
function arrayEachRight(array, iteratee) {
var length = array == null ? 0 : array.length;
while (length--) {
if (iteratee(array[length], length, array) === false) {
break;
}
}
return array;
}
/**
* A specialized version of `_.every` for arrays without support for
* iteratee shorthands.
*
* @private
* @param {Array} [array] The array to iterate over.
* @param {Function} predicate The function invoked per iteration.
* @returns {boolean} Returns `true` if all elements pass the predicate check,
* else `false`.
*/
function arrayEvery(array, predicate) {
var index = -1,
length = array == null ? 0 : array.length;
while (++index < length) {
if (!predicate(array[index], index, array)) {
return false;
}
}
return true;
}
/**
* A specialized version of `_.filter` for arrays without support for
* iteratee shorthands.
*
* @private
* @param {Array} [array] The array to iterate over.
* @param {Function} predicate The function invoked per iteration.
* @returns {Array} Returns the new filtered array.
*/
function arrayFilter(array, predicate) {
var index = -1,
length = array == null ? 0 : array.length,
resIndex = 0,
result = [];
while (++index < length) {
var value = array[index];
if (predicate(value, index, array)) {
result[resIndex++] = value;
}
}
return result;
}
/**
* A specialized version of `_.includes` for arrays without support for
* specifying an index to search from.
*
* @private
* @param {Array} [array] The array to inspect.
* @param {*} target The value to search for.
* @returns {boolean} Returns `true` if `target` is found, else `false`.
*/
function arrayIncludes(array, value) {
var length = array == null ? 0 : array.length;
return !!length && baseIndexOf(array, value, 0) > -1;
}
/**
* This function is like `arrayIncludes` except that it accepts a comparator.
*
* @private
* @param {Array} [array] The array to inspect.
* @param {*} target The value to search for.
* @param {Function} comparator The comparator invoked per element.
* @returns {boolean} Returns `true` if `target` is found, else `false`.
*/
function arrayIncludesWith(array, value, comparator) {
var index = -1,
length = array == null ? 0 : array.length;
while (++index < length) {
if (comparator(value, array[index])) {
return true;
}
}
return false;
}
/**
* A specialized version of `_.map` for arrays without support for iteratee
* shorthands.
*
* @private
* @param {Array} [array] The array to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @returns {Array} Returns the new mapped array.
*/
function arrayMap(array, iteratee) {
var index = -1,
length = array == null ? 0 : array.length,
result = Array(length);
while (++index < length) {
result[index] = iteratee(array[index], index, array);
}
return result;
}
/**
* Appends the elements of `values` to `array`.
*
* @private
* @param {Array} array The array to modify.
* @param {Array} values The values to append.
* @returns {Array} Returns `array`.
*/
function arrayPush(array, values) {
var index = -1,
length = values.length,
offset = array.length;
while (++index < length) {
array[offset + index] = values[index];
}
return array;
}
/**
* A specialized version of `_.reduce` for arrays without support for
* iteratee shorthands.
*
* @private
* @param {Array} [array] The array to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @param {*} [accumulator] The initial value.
* @param {boolean} [initAccum] Specify using the first element of `array` as
* the initial value.
* @returns {*} Returns the accumulated value.
*/
function arrayReduce(array, iteratee, accumulator, initAccum) {
var index = -1,
length = array == null ? 0 : array.length;
if (initAccum && length) {
accumulator = array[++index];
}
while (++index < length) {
accumulator = iteratee(accumulator, array[index], index, array);
}
return accumulator;
}
/**
* A specialized version of `_.reduceRight` for arrays without support for
* iteratee shorthands.
*
* @private
* @param {Array} [array] The array to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @param {*} [accumulator] The initial value.
* @param {boolean} [initAccum] Specify using the last element of `array` as
* the initial value.
* @returns {*} Returns the accumulated value.
*/
function arrayReduceRight(array, iteratee, accumulator, initAccum) {
var length = array == null ? 0 : array.length;
if (initAccum && length) {
accumulator = array[--length];
}
while (length--) {
accumulator = iteratee(accumulator, array[length], length, array);
}
return accumulator;
}
/**
* A specialized version of `_.some` for arrays without support for iteratee
* shorthands.
*
* @private
* @param {Array} [array] The array to iterate over.
* @param {Function} predicate The function invoked per iteration.
* @returns {boolean} Returns `true` if any element passes the predicate check,
* else `false`.
*/
function arraySome(array, predicate) {
var index = -1,
length = array == null ? 0 : array.length;
while (++index < length) {
if (predicate(array[index], index, array)) {
return true;
}
}
return false;
}
/**
* Gets the size of an ASCII `string`.
*
* @private
* @param {string} string The string inspect.
* @returns {number} Returns the string size.
*/
var asciiSize = baseProperty('length');
/**
* Converts an ASCII `string` to an array.
*
* @private
* @param {string} string The string to convert.
* @returns {Array} Returns the converted array.
*/
function asciiToArray(string) {
return string.split('');
}
/**
* Splits an ASCII `string` into an array of its words.
*
* @private
* @param {string} The string to inspect.
* @returns {Array} Returns the words of `string`.
*/
function asciiWords(string) {
return string.match(reAsciiWord) || [];
}
/**
* The base implementation of methods like `_.findKey` and `_.findLastKey`,
* without support for iteratee shorthands, which iterates over `collection`
* using `eachFunc`.
*
* @private
* @param {Array|Object} collection The collection to inspect.
* @param {Function} predicate The function invoked per iteration.
* @param {Function} eachFunc The function to iterate over `collection`.
* @returns {*} Returns the found element or its key, else `undefined`.
*/
function baseFindKey(collection, predicate, eachFunc) {
var result;
eachFunc(collection, function(value, key, collection) {
if (predicate(value, key, collection)) {
result = key;
return false;
}
});
return result;
}
/**
* The base implementation of `_.findIndex` and `_.findLastIndex` without
* support for iteratee shorthands.
*
* @private
* @param {Array} array The array to inspect.
* @param {Function} predicate The function invoked per iteration.
* @param {number} fromIndex The index to search from.
* @param {boolean} [fromRight] Specify iterating from right to left.
* @returns {number} Returns the index of the matched value, else `-1`.
*/
function baseFindIndex(array, predicate, fromIndex, fromRight) {
var length = array.length,
index = fromIndex + (fromRight ? 1 : -1);
while ((fromRight ? index-- : ++index < length)) {
if (predicate(array[index], index, array)) {
return index;
}
}
return -1;
}
/**
* The base implementation of `_.indexOf` without `fromIndex` bounds checks.
*
* @private
* @param {Array} array The array to inspect.
* @param {*} value The value to search for.
* @param {number} fromIndex The index to search from.
* @returns {number} Returns the index of the matched value, else `-1`.
*/
function baseIndexOf(array, value, fromIndex) {
return value === value
? strictIndexOf(array, value, fromIndex)
: baseFindIndex(array, baseIsNaN, fromIndex);
}
/**
* This function is like `baseIndexOf` except that it accepts a comparator.
*
* @private
* @param {Array} array The array to inspect.
* @param {*} value The value to search for.
* @param {number} fromIndex The index to search from.
* @param {Function} comparator The comparator invoked per element.
* @returns {number} Returns the index of the matched value, else `-1`.
*/
function baseIndexOfWith(array, value, fromIndex, comparator) {
var index = fromIndex - 1,
length = array.length;
while (++index < length) {
if (comparator(array[index], value)) {
return index;
}
}
return -1;
}
/**
* The base implementation of `_.isNaN` without support for number objects.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
*/
function baseIsNaN(value) {
return value !== value;
}
/**
* The base implementation of `_.mean` and `_.meanBy` without support for
* iteratee shorthands.
*
* @private
* @param {Array} array The array to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @returns {number} Returns the mean.
*/
function baseMean(array, iteratee) {
var length = array == null ? 0 : array.length;
return length ? (baseSum(array, iteratee) / length) : NAN;
}
/**
* The base implementation of `_.property` without support for deep paths.
*
* @private
* @param {string} key The key of the property to get.
* @returns {Function} Returns the new accessor function.
*/
function baseProperty(key) {
return function(object) {
return object == null ? undefined : object[key];
};
}
/**
* The base implementation of `_.propertyOf` without support for deep paths.
*
* @private
* @param {Object} object The object to query.
* @returns {Function} Returns the new accessor function.
*/
function basePropertyOf(object) {
return function(key) {
return object == null ? undefined : object[key];
};
}
/**
* The base implementation of `_.reduce` and `_.reduceRight`, without support
* for iteratee shorthands, which iterates over `collection` using `eachFunc`.
*
* @private
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @param {*} accumulator The initial value.
* @param {boolean} initAccum Specify using the first or last element of
* `collection` as the initial value.
* @param {Function} eachFunc The function to iterate over `collection`.
* @returns {*} Returns the accumulated value.
*/
function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) {
eachFunc(collection, function(value, index, collection) {
accumulator = initAccum
? (initAccum = false, value)
: iteratee(accumulator, value, index, collection);
});
return accumulator;
}
/**
* The base implementation of `_.sortBy` which uses `comparer` to define the
* sort order of `array` and replaces criteria objects with their corresponding
* values.
*
* @private
* @param {Array} array The array to sort.
* @param {Function} comparer The function to define sort order.
* @returns {Array} Returns `array`.
*/
function baseSortBy(array, comparer) {
var length = array.length;
array.sort(comparer);
while (length--) {
array[length] = array[length].value;
}
return array;
}
/**
* The base implementation of `_.sum` and `_.sumBy` without support for
* iteratee shorthands.
*
* @private
* @param {Array} array The array to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @returns {number} Returns the sum.
*/
function baseSum(array, iteratee) {
var result,
index = -1,
length = array.length;
while (++index < length) {
var current = iteratee(array[index]);
if (current !== undefined) {
result = result === undefined ? current : (result + current);
}
}
return result;
}
/**
* The base implementation of `_.times` without support for iteratee shorthands
* or max array length checks.
*
* @private
* @param {number} n The number of times to invoke `iteratee`.
* @param {Function} iteratee The function invoked per iteration.
* @returns {Array} Returns the array of results.
*/
function baseTimes(n, iteratee) {
var index = -1,
result = Array(n);
while (++index < n) {
result[index] = iteratee(index);
}
return result;
}
/**
* The base implementation of `_.toPairs` and `_.toPairsIn` which creates an array
* of key-value pairs for `object` corresponding to the property names of `props`.
*
* @private
* @param {Object} object The object to query.
* @param {Array} props The property names to get values for.
* @returns {Object} Returns the key-value pairs.
*/
function baseToPairs(object, props) {
return arrayMap(props, function(key) {
return [key, object[key]];
});
}
/**
* The base implementation of `_.unary` without support for storing metadata.
*
* @private
* @param {Function} func The function to cap arguments for.
* @returns {Function} Returns the new capped function.
*/
function baseUnary(func) {
return function(value) {
return func(value);
};
}
/**
* The base implementation of `_.values` and `_.valuesIn` which creates an
* array of `object` property values corresponding to the property names
* of `props`.
*
* @private
* @param {Object} object The object to query.
* @param {Array} props The property names to get values for.
* @returns {Object} Returns the array of property values.
*/
function baseValues(object, props) {
return arrayMap(props, function(key) {
return object[key];
});
}
/**
* Checks if a `cache` value for `key` exists.
*
* @private
* @param {Object} cache The cache to query.
* @param {string} key The key of the entry to check.
* @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
*/
function cacheHas(cache, key) {
return cache.has(key);
}
/**
* Used by `_.trim` and `_.trimStart` to get the index of the first string symbol
* that is not found in the character symbols.
*
* @private
* @param {Array} strSymbols The string symbols to inspect.
* @param {Array} chrSymbols The character symbols to find.
* @returns {number} Returns the index of the first unmatched string symbol.
*/
function charsStartIndex(strSymbols, chrSymbols) {
var index = -1,
length = strSymbols.length;
while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
return index;
}
/**
* Used by `_.trim` and `_.trimEnd` to get the index of the last string symbol
* that is not found in the character symbols.
*
* @private
* @param {Array} strSymbols The string symbols to inspect.
* @param {Array} chrSymbols The character symbols to find.
* @returns {number} Returns the index of the last unmatched string symbol.
*/
function charsEndIndex(strSymbols, chrSymbols) {
var index = strSymbols.length;
while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
return index;
}
/**
* Gets the number of `placeholder` occurrences in `array`.
*
* @private
* @param {Array} array The array to inspect.
* @param {*} placeholder The placeholder to search for.
* @returns {number} Returns the placeholder count.
*/
function countHolders(array, placeholder) {
var length = array.length,
result = 0;
while (length--) {
if (array[length] === placeholder) {
++result;
}
}
return result;
}
/**
* Used by `_.deburr` to convert Latin-1 Supplement and Latin Extended-A
* letters to basic Latin letters.
*
* @private
* @param {string} letter The matched letter to deburr.
* @returns {string} Returns the deburred letter.
*/
var deburrLetter = basePropertyOf(deburredLetters);
/**
* Used by `_.escape` to convert characters to HTML entities.
*
* @private
* @param {string} chr The matched character to escape.
* @returns {string} Returns the escaped character.
*/
var escapeHtmlChar = basePropertyOf(htmlEscapes);
/**
* Used by `_.template` to escape characters for inclusion in compiled string literals.
*
* @private
* @param {string} chr The matched character to escape.
* @returns {string} Returns the escaped character.
*/
function escapeStringChar(chr) {
return '\\' + stringEscapes[chr];
}
/**
* Gets the value at `key` of `object`.
*
* @private
* @param {Object} [object] The object to query.
* @param {string} key The key of the property to get.
* @returns {*} Returns the property value.
*/
function getValue(object, key) {
return object == null ? undefined : object[key];
}
/**
* Checks if `string` contains Unicode symbols.
*
* @private
* @param {string} string The string to inspect.
* @returns {boolean} Returns `true` if a symbol is found, else `false`.
*/
function hasUnicode(string) {
return reHasUnicode.test(string);
}
/**
* Checks if `string` contains a word composed of Unicode symbols.
*
* @private
* @param {string} string The string to inspect.
* @returns {boolean} Returns `true` if a word is found, else `false`.
*/
function hasUnicodeWord(string) {
return reHasUnicodeWord.test(string);
}
/**
* Converts `iterator` to an array.
*
* @private
* @param {Object} iterator The iterator to convert.
* @returns {Array} Returns the converted array.
*/
function iteratorToArray(iterator) {
var data,
result = [];
while (!(data = iterator.next()).done) {
result.push(data.value);
}
return result;
}
/**
* Converts `map` to its key-value pairs.
*
* @private
* @param {Object} map The map to convert.
* @returns {Array} Returns the key-value pairs.
*/
function mapToArray(map) {
var index = -1,
result = Array(map.size);
map.forEach(function(value, key) {
result[++index] = [key, value];
});
return result;
}
/**
* Creates a unary function that invokes `func` with its argument transformed.
*
* @private
* @param {Function} func The function to wrap.
* @param {Function} transform The argument transform.
* @returns {Function} Returns the new function.
*/
function overArg(func, transform) {
return function(arg) {
return func(transform(arg));
};
}
/**
* Replaces all `placeholder` elements in `array` with an internal placeholder
* and returns an array of their indexes.
*
* @private
* @param {Array} array The array to modify.
* @param {*} placeholder The placeholder to replace.
* @returns {Array} Returns the new array of placeholder indexes.
*/
function replaceHolders(array, placeholder) {
var index = -1,
length = array.length,
resIndex = 0,
result = [];
while (++index < length) {
var value = array[index];
if (value === placeholder || value === PLACEHOLDER) {
array[index] = PLACEHOLDER;
result[resIndex++] = index;
}
}
return result;
}
/**
* Converts `set` to an array of its values.
*
* @private
* @param {Object} set The set to convert.
* @returns {Array} Returns the values.
*/
function setToArray(set) {
var index = -1,
result = Array(set.size);
set.forEach(function(value) {
result[++index] = value;
});
return result;
}
/**
* Converts `set` to its value-value pairs.
*
* @private
* @param {Object} set The set to convert.
* @returns {Array} Returns the value-value pairs.
*/
function setToPairs(set) {
var index = -1,
result = Array(set.size);
set.forEach(function(value) {
result[++index] = [value, value];
});
return result;
}
/**
* A specialized version of `_.indexOf` which performs strict equality
* comparisons of values, i.e. `===`.
*
* @private
* @param {Array} array The array to inspect.
* @param {*} value The value to search for.
* @param {number} fromIndex The index to search from.
* @returns {number} Returns the index of the matched value, else `-1`.
*/
function strictIndexOf(array, value, fromIndex) {
var index = fromIndex - 1,
length = array.length;
while (++index < length) {
if (array[index] === value) {
return index;
}
}
return -1;
}
/**
* A specialized version of `_.lastIndexOf` which performs strict equality
* comparisons of values, i.e. `===`.
*
* @private
* @param {Array} array The array to inspect.
* @param {*} value The value to search for.
* @param {number} fromIndex The index to search from.
* @returns {number} Returns the index of the matched value, else `-1`.
*/
function strictLastIndexOf(array, value, fromIndex) {
var index = fromIndex + 1;
while (index--) {
if (array[index] === value) {
return index;
}
}
return index;
}
/**
* Gets the number of symbols in `string`.
*
* @private
* @param {string} string The string to inspect.
* @returns {number} Returns the string size.
*/
function stringSize(string) {
return hasUnicode(string)
? unicodeSize(string)
: asciiSize(string);
}
/**
* Converts `string` to an array.
*
* @private
* @param {string} string The string to convert.
* @returns {Array} Returns the converted array.
*/
function stringToArray(string) {
return hasUnicode(string)
? unicodeToArray(string)
: asciiToArray(string);
}
/**
* Used by `_.unescape` to convert HTML entities to characters.
*
* @private
* @param {string} chr The matched character to unescape.
* @returns {string} Returns the unescaped character.
*/
var unescapeHtmlChar = basePropertyOf(htmlUnescapes);
/**
* Gets the size of a Unicode `string`.
*
* @private
* @param {string} string The string inspect.
* @returns {number} Returns the string size.
*/
function unicodeSize(string) {
var result = reUnicode.lastIndex = 0;
while (reUnicode.test(string)) {
++result;
}
return result;
}
/**
* Converts a Unicode `string` to an array.
*
* @private
* @param {string} string The string to convert.
* @returns {Array} Returns the converted array.
*/
function unicodeToArray(string) {
return string.match(reUnicode) || [];
}
/**
* Splits a Unicode `string` into an array of its words.
*
* @private
* @param {string} The string to inspect.
* @returns {Array} Returns the words of `string`.
*/
function unicodeWords(string) {
return string.match(reUnicodeWord) || [];
}
/*--------------------------------------------------------------------------*/
/**
* Create a new pristine `lodash` function using the `context` object.
*
* @static
* @memberOf _
* @since 1.1.0
* @category Util
* @param {Object} [context=root] The context object.
* @returns {Function} Returns a new `lodash` function.
* @example
*
* _.mixin({ 'foo': _.constant('foo') });
*
* var lodash = _.runInContext();
* lodash.mixin({ 'bar': lodash.constant('bar') });
*
* _.isFunction(_.foo);
* // => true
* _.isFunction(_.bar);
* // => false
*
* lodash.isFunction(lodash.foo);
* // => false
* lodash.isFunction(lodash.bar);
* // => true
*
* // Create a suped-up `defer` in Node.js.
* var defer = _.runInContext({ 'setTimeout': setImmediate }).defer;
*/
var runInContext = (function runInContext(context) {
context = context == null ? root : _.defaults(root.Object(), context, _.pick(root, contextProps));
/** Built-in constructor references. */
var Array = context.Array,
Date = context.Date,
Error = context.Error,
Function = context.Function,
Math = context.Math,
Object = context.Object,
RegExp = context.RegExp,
String = context.String,
TypeError = context.TypeError;
/** Used for built-in method references. */
var arrayProto = Array.prototype,
funcProto = Function.prototype,
objectProto = Object.prototype;
/** Used to detect overreaching core-js shims. */
var coreJsData = context['__core-js_shared__'];
/** Used to resolve the decompiled source of functions. */
var funcToString = funcProto.toString;
/** Used to check objects for own properties. */
var hasOwnProperty = objectProto.hasOwnProperty;
/** Used to generate unique IDs. */
var idCounter = 0;
/** Used to detect methods masquerading as native. */
var maskSrcKey = (function() {
var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
return uid ? ('Symbol(src)_1.' + uid) : '';
}());
/**
* Used to resolve the
* [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
* of values.
*/
var nativeObjectToString = objectProto.toString;
/** Used to infer the `Object` constructor. */
var objectCtorString = funcToString.call(Object);
/** Used to restore the original `_` reference in `_.noConflict`. */
var oldDash = root._;
/** Used to detect if a method is native. */
var reIsNative = RegExp('^' +
funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
.replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
);
/** Built-in value references. */
var Buffer = moduleExports ? context.Buffer : undefined,
Symbol = context.Symbol,
Uint8Array = context.Uint8Array,
allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined,
getPrototype = overArg(Object.getPrototypeOf, Object),
objectCreate = Object.create,
propertyIsEnumerable = objectProto.propertyIsEnumerable,
splice = arrayProto.splice,
spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined,
symIterator = Symbol ? Symbol.iterator : undefined,
symToStringTag = Symbol ? Symbol.toStringTag : undefined;
var defineProperty = (function() {
try {
var func = getNative(Object, 'defineProperty');
func({}, '', {});
return func;
} catch (e) {}
}());
/** Mocked built-ins. */
var ctxClearTimeout = context.clearTimeout !== root.clearTimeout && context.clearTimeout,
ctxNow = Date && Date.now !== root.Date.now && Date.now,
ctxSetTimeout = context.setTimeout !== root.setTimeout && context.setTimeout;
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeCeil = Math.ceil,
nativeFloor = Math.floor,
nativeGetSymbols = Object.getOwnPropertySymbols,
nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
nativeIsFinite = context.isFinite,
nativeJoin = arrayProto.join,
nativeKeys = overArg(Object.keys, Object),
nativeMax = Math.max,
nativeMin = Math.min,
nativeNow = Date.now,
nativeParseInt = context.parseInt,
nativeRandom = Math.random,
nativeReverse = arrayProto.reverse;
/* Built-in method references that are verified to be native. */
var DataView = getNative(context, 'DataView'),
Map = getNative(context, 'Map'),
Promise = getNative(context, 'Promise'),
Set = getNative(context, 'Set'),
WeakMap = getNative(context, 'WeakMap'),
nativeCreate = getNative(Object, 'create');
/** Used to store function metadata. */
var metaMap = WeakMap && new WeakMap;
/** Used to lookup unminified function names. */
var realNames = {};
/** Used to detect maps, sets, and weakmaps. */
var dataViewCtorString = toSource(DataView),
mapCtorString = toSource(Map),
promiseCtorString = toSource(Promise),
setCtorString = toSource(Set),
weakMapCtorString = toSource(WeakMap);
/** Used to convert symbols to primitives and strings. */
var symbolProto = Symbol ? Symbol.prototype : undefined,
symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
symbolToString = symbolProto ? symbolProto.toString : undefined;
/*------------------------------------------------------------------------*/
/**
* Creates a `lodash` object which wraps `value` to enable implicit method
* chain sequences. Methods that operate on and return arrays, collections,
* and functions can be chained together. Methods that retrieve a single value
* or may return a primitive value will automatically end the chain sequence
* and return the unwrapped value. Otherwise, the value must be unwrapped
* with `_#value`.
*
* Explicit chain sequences, which must be unwrapped with `_#value`, may be
* enabled using `_.chain`.
*
* The execution of chained methods is lazy, that is, it's deferred until
* `_#value` is implicitly or explicitly called.
*
* Lazy evaluation allows several methods to support shortcut fusion.
* Shortcut fusion is an optimization to merge iteratee calls; this avoids
* the creation of intermediate arrays and can greatly reduce the number of
* iteratee executions. Sections of a chain sequence qualify for shortcut
* fusion if the section is applied to an array of at least `200` elements
* and any iteratees accept only one argument. The heuristic for whether a
* section qualifies for shortcut fusion is subject to change.
*
* Chaining is supported in custom builds as long as the `_#value` method is
* directly or indirectly included in the build.
*
* In addition to lodash methods, wrappers have `Array` and `String` methods.
*
* The wrapper `Array` methods are:
* `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`
*
* The wrapper `String` methods are:
* `replace` and `split`
*
* The wrapper methods that support shortcut fusion are:
* `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,
* `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,
* `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`
*
* The chainable wrapper methods are:
* `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`,
* `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`,
* `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`,
* `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`,
* `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`,
* `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`,
* `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`,
* `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`,
* `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`,
* `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`,
* `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`,
* `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`,
* `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`,
* `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`,
* `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`,
* `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`,
* `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`,
* `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`,
* `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`,
* `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`,
* `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`,
* `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`,
* `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`,
* `zipObject`, `zipObjectDeep`, and `zipWith`
*
* The wrapper methods that are **not** chainable by default are:
* `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,
* `cloneDeep`, `cloneDeepWith`, `cloneWith`, `conformsTo`, `deburr`,
* `defaultTo`, `divide`, `each`, `eachRight`, `endsWith`, `eq`, `escape`,
* `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`,
* `findLastIndex`, `findLastKey`, `first`, `floor`, `forEach`, `forEachRight`,
* `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`,
* `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`,
* `isArguments`, `isArray`, `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`,
* `isBoolean`, `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`,
* `isEqualWith`, `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`,
* `isMap`, `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,
* `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,
* `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`,
* `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`,
* `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`,
* `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,
* `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,
* `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,
* `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,
* `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,
* `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,
* `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,
* `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,
* `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,
* `upperFirst`, `value`, and `words`
*
* @name _
* @constructor
* @category Seq
* @param {*} value The value to wrap in a `lodash` instance.
* @returns {Object} Returns the new `lodash` wrapper instance.
* @example
*
* function square(n) {
* return n * n;
* }
*
* var wrapped = _([1, 2, 3]);
*
* // Returns an unwrapped value.
* wrapped.reduce(_.add);
* // => 6
*
* // Returns a wrapped value.
* var squares = wrapped.map(square);
*
* _.isArray(squares);
* // => false
*
* _.isArray(squares.value());
* // => true
*/
function lodash(value) {
if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) {
if (value instanceof LodashWrapper) {
return value;
}
if (hasOwnProperty.call(value, '__wrapped__')) {
return wrapperClone(value);
}
}
return new LodashWrapper(value);
}
/**
* The base implementation of `_.create` without support for assigning
* properties to the created object.
*
* @private
* @param {Object} proto The object to inherit from.
* @returns {Object} Returns the new object.
*/
var baseCreate = (function() {
function object() {}
return function(proto) {
if (!isObject(proto)) {
return {};
}
if (objectCreate) {
return objectCreate(proto);
}
object.prototype = proto;
var result = new object;
object.prototype = undefined;
return result;
};
}());
/**
* The function whose prototype chain sequence wrappers inherit from.
*
* @private
*/
function baseLodash() {
// No operation performed.
}
/**
* The base constructor for creating `lodash` wrapper objects.
*
* @private
* @param {*} value The value to wrap.
* @param {boolean} [chainAll] Enable explicit method chain sequences.
*/
function LodashWrapper(value, chainAll) {
this.__wrapped__ = value;
this.__actions__ = [];
this.__chain__ = !!chainAll;
this.__index__ = 0;
this.__values__ = undefined;
}
/**
* By default, the template delimiters used by lodash are like those in
* embedded Ruby (ERB). Change the following template settings to use
* alternative delimiters.
*
* @static
* @memberOf _
* @type {Object}
*/
lodash.templateSettings = {
/**
* Used to detect `data` property values to be HTML-escaped.
*
* @memberOf _.templateSettings
* @type {RegExp}
*/
'escape': reEscape,
/**
* Used to detect code to be evaluated.
*
* @memberOf _.templateSettings
* @type {RegExp}
*/
'evaluate': reEvaluate,
/**
* Used to detect `data` property values to inject.
*
* @memberOf _.templateSettings
* @type {RegExp}
*/
'interpolate': reInterpolate,
/**
* Used to reference the data object in the template text.
*
* @memberOf _.templateSettings
* @type {string}
*/
'variable': '',
/**
* Used to import variables into the compiled template.
*
* @memberOf _.templateSettings
* @type {Object}
*/
'imports': {
/**
* A reference to the `lodash` function.
*
* @memberOf _.templateSettings.imports
* @type {Function}
*/
'_': lodash
}
};
// Ensure wrappers are instances of `baseLodash`.
lodash.prototype = baseLodash.prototype;
lodash.prototype.constructor = lodash;
LodashWrapper.prototype = baseCreate(baseLodash.prototype);
LodashWrapper.prototype.constructor = LodashWrapper;
/*------------------------------------------------------------------------*/
/**
* Creates a lazy wrapper object which wraps `value` to enable lazy evaluation.
*
* @private
* @constructor
* @param {*} value The value to wrap.
*/
function LazyWrapper(value) {
this.__wrapped__ = value;
this.__actions__ = [];
this.__dir__ = 1;
this.__filtered__ = false;
this.__iteratees__ = [];
this.__takeCount__ = MAX_ARRAY_LENGTH;
this.__views__ = [];
}
/**
* Creates a clone of the lazy wrapper object.
*
* @private
* @name clone
* @memberOf LazyWrapper
* @returns {Object} Returns the cloned `LazyWrapper` object.
*/
function lazyClone() {
var result = new LazyWrapper(this.__wrapped__);
result.__actions__ = copyArray(this.__actions__);
result.__dir__ = this.__dir__;
result.__filtered__ = this.__filtered__;
result.__iteratees__ = copyArray(this.__iteratees__);
result.__takeCount__ = this.__takeCount__;
result.__views__ = copyArray(this.__views__);
return result;
}
/**
* Reverses the direction of lazy iteration.
*
* @private
* @name reverse
* @memberOf LazyWrapper
* @returns {Object} Returns the new reversed `LazyWrapper` object.
*/
function lazyReverse() {
if (this.__filtered__) {
var result = new LazyWrapper(this);
result.__dir__ = -1;
result.__filtered__ = true;
} else {
result = this.clone();
result.__dir__ *= -1;
}
return result;
}
/**
* Extracts the unwrapped value from its lazy wrapper.
*
* @private
* @name value
* @memberOf LazyWrapper
* @returns {*} Returns the unwrapped value.
*/
function lazyValue() {
var array = this.__wrapped__.value(),
dir = this.__dir__,
isArr = isArray(array),
isRight = dir < 0,
arrLength = isArr ? array.length : 0,
view = getView(0, arrLength, this.__views__),
start = view.start,
end = view.end,
length = end - start,
index = isRight ? end : (start - 1),
iteratees = this.__iteratees__,
iterLength = iteratees.length,
resIndex = 0,
takeCount = nativeMin(length, this.__takeCount__);
if (!isArr || arrLength < LARGE_ARRAY_SIZE ||
(arrLength == length && takeCount == length)) {
return baseWrapperValue(array, this.__actions__);
}
var result = [];
outer:
while (length-- && resIndex < takeCount) {
index += dir;
var iterIndex = -1,
value = array[index];
while (++iterIndex < iterLength) {
var data = iteratees[iterIndex],
iteratee = data.iteratee,
type = data.type,
computed = iteratee(value);
if (type == LAZY_MAP_FLAG) {
value = computed;
} else if (!computed) {
if (type == LAZY_FILTER_FLAG) {
continue outer;
} else {
break outer;
}
}
}
result[resIndex++] = value;
}
return result;
}
// Ensure `LazyWrapper` is an instance of `baseLodash`.
LazyWrapper.prototype = baseCreate(baseLodash.prototype);
LazyWrapper.prototype.constructor = LazyWrapper;
/*------------------------------------------------------------------------*/
/**
* Creates a hash object.
*
* @private
* @constructor
* @param {Array} [entries] The key-value pairs to cache.
*/
function Hash(entries) {
var index = -1,
length = entries == null ? 0 : entries.length;
this.clear();
while (++index < length) {
var entry = entries[index];
this.set(entry[0], entry[1]);
}
}
/**
* Removes all key-value entries from the hash.
*
* @private
* @name clear
* @memberOf Hash
*/
function hashClear() {
this.__data__ = nativeCreate ? nativeCreate(null) : {};
this.size = 0;
}
/**
* Removes `key` and its value from the hash.
*
* @private
* @name delete
* @memberOf Hash
* @param {Object} hash The hash to modify.
* @param {string} key The key of the value to remove.
* @returns {boolean} Returns `true` if the entry was removed, else `false`.
*/
function hashDelete(key) {
var result = this.has(key) && delete this.__data__[key];
this.size -= result ? 1 : 0;
return result;
}
/**
* Gets the hash value for `key`.
*
* @private
* @name get
* @memberOf Hash
* @param {string} key The key of the value to get.
* @returns {*} Returns the entry value.
*/
function hashGet(key) {
var data = this.__data__;
if (nativeCreate) {
var result = data[key];
return result === HASH_UNDEFINED ? undefined : result;
}
return hasOwnProperty.call(data, key) ? data[key] : undefined;
}
/**
* Checks if a hash value for `key` exists.
*
* @private
* @name has
* @memberOf Hash
* @param {string} key The key of the entry to check.
* @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
*/
function hashHas(key) {
var data = this.__data__;
return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
}
/**
* Sets the hash `key` to `value`.
*
* @private
* @name set
* @memberOf Hash
* @param {string} key The key of the value to set.
* @param {*} value The value to set.
* @returns {Object} Returns the hash instance.
*/
function hashSet(key, value) {
var data = this.__data__;
this.size += this.has(key) ? 0 : 1;
data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
return this;
}
// Add methods to `Hash`.
Hash.prototype.clear = hashClear;
Hash.prototype['delete'] = hashDelete;
Hash.prototype.get = hashGet;
Hash.prototype.has = hashHas;
Hash.prototype.set = hashSet;
/*------------------------------------------------------------------------*/
/**
* Creates an list cache object.
*
* @private
* @constructor
* @param {Array} [entries] The key-value pairs to cache.
*/
function ListCache(entries) {
var index = -1,
length = entries == null ? 0 : entries.length;
this.clear();
while (++index < length) {
var entry = entries[index];
this.set(entry[0], entry[1]);
}
}
/**
* Removes all key-value entries from the list cache.
*
* @private
* @name clear
* @memberOf ListCache
*/
function listCacheClear() {
this.__data__ = [];
this.size = 0;
}
/**
* Removes `key` and its value from the list cache.
*
* @private
* @name delete
* @memberOf ListCache
* @param {string} key The key of the value to remove.
* @returns {boolean} Returns `true` if the entry was removed, else `false`.
*/
function listCacheDelete(key) {
var data = this.__data__,
index = assocIndexOf(data, key);
if (index < 0) {
return false;
}
var lastIndex = data.length - 1;
if (index == lastIndex) {
data.pop();
} else {
splice.call(data, index, 1);
}
--this.size;
return true;
}
/**
* Gets the list cache value for `key`.
*
* @private
* @name get
* @memberOf ListCache
* @param {string} key The key of the value to get.
* @returns {*} Returns the entry value.
*/
function listCacheGet(key) {
var data = this.__data__,
index = assocIndexOf(data, key);
return index < 0 ? undefined : data[index][1];
}
/**
* Checks if a list cache value for `key` exists.
*
* @private
* @name has
* @memberOf ListCache
* @param {string} key The key of the entry to check.
* @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
*/
function listCacheHas(key) {
return assocIndexOf(this.__data__, key) > -1;
}
/**
* Sets the list cache `key` to `value`.
*
* @private
* @name set
* @memberOf ListCache
* @param {string} key The key of the value to set.
* @param {*} value The value to set.
* @returns {Object} Returns the list cache instance.
*/
function listCacheSet(key, value) {
var data = this.__data__,
index = assocIndexOf(data, key);
if (index < 0) {
++this.size;
data.push([key, value]);
} else {
data[index][1] = value;
}
return this;
}
// Add methods to `ListCache`.
ListCache.prototype.clear = listCacheClear;
ListCache.prototype['delete'] = listCacheDelete;
ListCache.prototype.get = listCacheGet;
ListCache.prototype.has = listCacheHas;
ListCache.prototype.set = listCacheSet;
/*------------------------------------------------------------------------*/
/**
* Creates a map cache object to store key-value pairs.
*
* @private
* @constructor
* @param {Array} [entries] The key-value pairs to cache.
*/
function MapCache(entries) {
var index = -1,
length = entries == null ? 0 : entries.length;
this.clear();
while (++index < length) {
var entry = entries[index];
this.set(entry[0], entry[1]);
}
}
/**
* Removes all key-value entries from the map.
*
* @private
* @name clear
* @memberOf MapCache
*/
function mapCacheClear() {
this.size = 0;
this.__data__ = {
'hash': new Hash,
'map': new (Map || ListCache),
'string': new Hash
};
}
/**
* Removes `key` and its value from the map.
*
* @private
* @name delete
* @memberOf MapCache
* @param {string} key The key of the value to remove.
* @returns {boolean} Returns `true` if the entry was removed, else `false`.
*/
function mapCacheDelete(key) {
var result = getMapData(this, key)['delete'](key);
this.size -= result ? 1 : 0;
return result;
}
/**
* Gets the map value for `key`.
*
* @private
* @name get
* @memberOf MapCache
* @param {string} key The key of the value to get.
* @returns {*} Returns the entry value.
*/
function mapCacheGet(key) {
return getMapData(this, key).get(key);
}
/**
* Checks if a map value for `key` exists.
*
* @private
* @name has
* @memberOf MapCache
* @param {string} key The key of the entry to check.
* @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
*/
function mapCacheHas(key) {
return getMapData(this, key).has(key);
}
/**
* Sets the map `key` to `value`.
*
* @private
* @name set
* @memberOf MapCache
* @param {string} key The key of the value to set.
* @param {*} value The value to set.
* @returns {Object} Returns the map cache instance.
*/
function mapCacheSet(key, value) {
var data = getMapData(this, key),
size = data.size;
data.set(key, value);
this.size += data.size == size ? 0 : 1;
return this;
}
// Add methods to `MapCache`.
MapCache.prototype.clear = mapCacheClear;
MapCache.prototype['delete'] = mapCacheDelete;
MapCache.prototype.get = mapCacheGet;
MapCache.prototype.has = mapCacheHas;
MapCache.prototype.set = mapCacheSet;
/*------------------------------------------------------------------------*/
/**
*
* Creates an array cache object to store unique values.
*
* @private
* @constructor
* @param {Array} [values] The values to cache.
*/
function SetCache(values) {
var index = -1,
length = values == null ? 0 : values.length;
this.__data__ = new MapCache;
while (++index < length) {
this.add(values[index]);
}
}
/**
* Adds `value` to the array cache.
*
* @private
* @name add
* @memberOf SetCache
* @alias push
* @param {*} value The value to cache.
* @returns {Object} Returns the cache instance.
*/
function setCacheAdd(value) {
this.__data__.set(value, HASH_UNDEFINED);
return this;
}
/**
* Checks if `value` is in the array cache.
*
* @private
* @name has
* @memberOf SetCache
* @param {*} value The value to search for.
* @returns {number} Returns `true` if `value` is found, else `false`.
*/
function setCacheHas(value) {
return this.__data__.has(value);
}
// Add methods to `SetCache`.
SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
SetCache.prototype.has = setCacheHas;
/*------------------------------------------------------------------------*/
/**
* Creates a stack cache object to store key-value pairs.
*
* @private
* @constructor
* @param {Array} [entries] The key-value pairs to cache.
*/
function Stack(entries) {
var data = this.__data__ = new ListCache(entries);
this.size = data.size;
}
/**
* Removes all key-value entries from the stack.
*
* @private
* @name clear
* @memberOf Stack
*/
function stackClear() {
this.__data__ = new ListCache;
this.size = 0;
}
/**
* Removes `key` and its value from the stack.
*
* @private
* @name delete
* @memberOf Stack
* @param {string} key The key of the value to remove.
* @returns {boolean} Returns `true` if the entry was removed, else `false`.
*/
function stackDelete(key) {
var data = this.__data__,
result = data['delete'](key);
this.size = data.size;
return result;
}
/**
* Gets the stack value for `key`.
*
* @private
* @name get
* @memberOf Stack
* @param {string} key The key of the value to get.
* @returns {*} Returns the entry value.
*/
function stackGet(key) {
return this.__data__.get(key);
}
/**
* Checks if a stack value for `key` exists.
*
* @private
* @name has
* @memberOf Stack
* @param {string} key The key of the entry to check.
* @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
*/
function stackHas(key) {
return this.__data__.has(key);
}
/**
* Sets the stack `key` to `value`.
*
* @private
* @name set
* @memberOf Stack
* @param {string} key The key of the value to set.
* @param {*} value The value to set.
* @returns {Object} Returns the stack cache instance.
*/
function stackSet(key, value) {
var data = this.__data__;
if (data instanceof ListCache) {
var pairs = data.__data__;
if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
pairs.push([key, value]);
this.size = ++data.size;
return this;
}
data = this.__data__ = new MapCache(pairs);
}
data.set(key, value);
this.size = data.size;
return this;
}
// Add methods to `Stack`.
Stack.prototype.clear = stackClear;
Stack.prototype['delete'] = stackDelete;
Stack.prototype.get = stackGet;
Stack.prototype.has = stackHas;
Stack.prototype.set = stackSet;
/*------------------------------------------------------------------------*/
/**
* Creates an array of the enumerable property names of the array-like `value`.
*
* @private
* @param {*} value The value to query.
* @param {boolean} inherited Specify returning inherited property names.
* @returns {Array} Returns the array of property names.
*/
function arrayLikeKeys(value, inherited) {
var isArr = isArray(value),
isArg = !isArr && isArguments(value),
isBuff = !isArr && !isArg && isBuffer(value),
isType = !isArr && !isArg && !isBuff && isTypedArray(value),
skipIndexes = isArr || isArg || isBuff || isType,
result = skipIndexes ? baseTimes(value.length, String) : [],
length = result.length;
for (var key in value) {
if ((inherited || hasOwnProperty.call(value, key)) &&
!(skipIndexes && (
// Safari 9 has enumerable `arguments.length` in strict mode.
key == 'length' ||
// Node.js 0.10 has enumerable non-index properties on buffers.
(isBuff && (key == 'offset' || key == 'parent')) ||
// PhantomJS 2 has enumerable non-index properties on typed arrays.
(isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
// Skip index properties.
isIndex(key, length)
))) {
result.push(key);
}
}
return result;
}
/**
* A specialized version of `_.sample` for arrays.
*
* @private
* @param {Array} array The array to sample.
* @returns {*} Returns the random element.
*/
function arraySample(array) {
var length = array.length;
return length ? array[baseRandom(0, length - 1)] : undefined;
}
/**
* A specialized version of `_.sampleSize` for arrays.
*
* @private
* @param {Array} array The array to sample.
* @param {number} n The number of elements to sample.
* @returns {Array} Returns the random elements.
*/
function arraySampleSize(array, n) {
return shuffleSelf(copyArray(array), baseClamp(n, 0, array.length));
}
/**
* A specialized version of `_.shuffle` for arrays.
*
* @private
* @param {Array} array The array to shuffle.
* @returns {Array} Returns the new shuffled array.
*/
function arrayShuffle(array) {
return shuffleSelf(copyArray(array));
}
/**
* Used by `_.defaults` to customize its `_.assignIn` use.
*
* @private
* @param {*} objValue The destination value.
* @param {*} srcValue The source value.
* @param {string} key The key of the property to assign.
* @param {Object} object The parent object of `objValue`.
* @returns {*} Returns the value to assign.
*/
function assignInDefaults(objValue, srcValue, key, object) {
if (objValue === undefined ||
(eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) {
return srcValue;
}
return objValue;
}
/**
* This function is like `assignValue` except that it doesn't assign
* `undefined` values.
*
* @private
* @param {Object} object The object to modify.
* @param {string} key The key of the property to assign.
* @param {*} value The value to assign.
*/
function assignMergeValue(object, key, value) {
if ((value !== undefined && !eq(object[key], value)) ||
(value === undefined && !(key in object))) {
baseAssignValue(object, key, value);
}
}
/**
* Assigns `value` to `key` of `object` if the existing value is not equivalent
* using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
* for equality comparisons.
*
* @private
* @param {Object} object The object to modify.
* @param {string} key The key of the property to assign.
* @param {*} value The value to assign.
*/
function assignValue(object, key, value) {
var objValue = object[key];
if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
(value === undefined && !(key in object))) {
baseAssignValue(object, key, value);
}
}
/**
* Gets the index at which the `key` is found in `array` of key-value pairs.
*
* @private
* @param {Array} array The array to inspect.
* @param {*} key The key to search for.
* @returns {number} Returns the index of the matched value, else `-1`.
*/
function assocIndexOf(array, key) {
var length = array.length;
while (length--) {
if (eq(array[length][0], key)) {
return length;
}
}
return -1;
}
/**
* Aggregates elements of `collection` on `accumulator` with keys transformed
* by `iteratee` and values set by `setter`.
*
* @private
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} setter The function to set `accumulator` values.
* @param {Function} iteratee The iteratee to transform keys.
* @param {Object} accumulator The initial aggregated object.
* @returns {Function} Returns `accumulator`.
*/
function baseAggregator(collection, setter, iteratee, accumulator) {
baseEach(collection, function(value, key, collection) {
setter(accumulator, value, iteratee(value), collection);
});
return accumulator;
}
/**
* The base implementation of `_.assign` without support for multiple sources
* or `customizer` functions.
*
* @private
* @param {Object} object The destination object.
* @param {Object} source The source object.
* @returns {Object} Returns `object`.
*/
function baseAssign(object, source) {
return object && copyObject(source, keys(source), object);
}
/**
* The base implementation of `assignValue` and `assignMergeValue` without
* value checks.
*
* @private
* @param {Object} object The object to modify.
* @param {string} key The key of the property to assign.
* @param {*} value The value to assign.
*/
function baseAssignValue(object, key, value) {
if (key == '__proto__' && defineProperty) {
defineProperty(object, key, {
'configurable': true,
'enumerable': true,
'value': value,
'writable': true
});
} else {
object[key] = value;
}
}
/**
* The base implementation of `_.at` without support for individual paths.
*
* @private
* @param {Object} object The object to iterate over.
* @param {string[]} paths The property paths of elements to pick.
* @returns {Array} Returns the picked elements.
*/
function baseAt(object, paths) {
var index = -1,
length = paths.length,
result = Array(length),
skip = object == null;
while (++index < length) {
result[index] = skip ? undefined : get(object, paths[index]);
}
return result;
}
/**
* The base implementation of `_.clamp` which doesn't coerce arguments.
*
* @private
* @param {number} number The number to clamp.
* @param {number} [lower] The lower bound.
* @param {number} upper The upper bound.
* @returns {number} Returns the clamped number.
*/
function baseClamp(number, lower, upper) {
if (number === number) {
if (upper !== undefined) {
number = number <= upper ? number : upper;
}
if (lower !== undefined) {
number = number >= lower ? number : lower;
}
}
return number;
}
/**
* The base implementation of `_.clone` and `_.cloneDeep` which tracks
* traversed objects.
*
* @private
* @param {*} value The value to clone.
* @param {boolean} [isDeep] Specify a deep clone.
* @param {boolean} [isFull] Specify a clone including symbols.
* @param {Function} [customizer] The function to customize cloning.
* @param {string} [key] The key of `value`.
* @param {Object} [object] The parent object of `value`.
* @param {Object} [stack] Tracks traversed objects and their clone counterparts.
* @returns {*} Returns the cloned value.
*/
function baseClone(value, isDeep, isFull, customizer, key, object, stack) {
var result;
if (customizer) {
result = object ? customizer(value, key, object, stack) : customizer(value);
}
if (result !== undefined) {
return result;
}
if (!isObject(value)) {
return value;
}
var isArr = isArray(value);
if (isArr) {
result = initCloneArray(value);
if (!isDeep) {
return copyArray(value, result);
}
} else {
var tag = getTag(value),
isFunc = tag == funcTag || tag == genTag;
if (isBuffer(value)) {
return cloneBuffer(value, isDeep);
}
if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
result = initCloneObject(isFunc ? {} : value);
if (!isDeep) {
return copySymbols(value, baseAssign(result, value));
}
} else {
if (!cloneableTags[tag]) {
return object ? value : {};
}
result = initCloneByTag(value, tag, baseClone, isDeep);
}
}
// Check for circular references and return its corresponding clone.
stack || (stack = new Stack);
var stacked = stack.get(value);
if (stacked) {
return stacked;
}
stack.set(value, result);
var props = isArr ? undefined : (isFull ? getAllKeys : keys)(value);
arrayEach(props || value, function(subValue, key) {
if (props) {
key = subValue;
subValue = value[key];
}
// Recursively populate clone (susceptible to call stack limits).
assignValue(result, key, baseClone(subValue, isDeep, isFull, customizer, key, value, stack));
});
return result;
}
/**
* The base implementation of `_.conforms` which doesn't clone `source`.
*
* @private
* @param {Object} source The object of property predicates to conform to.
* @returns {Function} Returns the new spec function.
*/
function baseConforms(source) {
var props = keys(source);
return function(object) {
return baseConformsTo(object, source, props);
};
}
/**
* The base implementation of `_.conformsTo` which accepts `props` to check.
*
* @private
* @param {Object} object The object to inspect.
* @param {Object} source The object of property predicates to conform to.
* @returns {boolean} Returns `true` if `object` conforms, else `false`.
*/
function baseConformsTo(object, source, props) {
var length = props.length;
if (object == null) {
return !length;
}
object = Object(object);
while (length--) {
var key = props[length],
predicate = source[key],
value = object[key];
if ((value === undefined && !(key in object)) || !predicate(value)) {
return false;
}
}
return true;
}
/**
* The base implementation of `_.delay` and `_.defer` which accepts `args`
* to provide to `func`.
*
* @private
* @param {Function} func The function to delay.
* @param {number} wait The number of milliseconds to delay invocation.
* @param {Array} args The arguments to provide to `func`.
* @returns {number|Object} Returns the timer id or timeout object.
*/
function baseDelay(func, wait, args) {
if (typeof func != 'function') {
throw new TypeError(FUNC_ERROR_TEXT);
}
return setTimeout(function() { func.apply(undefined, args); }, wait);
}
/**
* The base implementation of methods like `_.difference` without support
* for excluding multiple arrays or iteratee shorthands.
*
* @private
* @param {Array} array The array to inspect.
* @param {Array} values The values to exclude.
* @param {Function} [iteratee] The iteratee invoked per element.
* @param {Function} [comparator] The comparator invoked per element.
* @returns {Array} Returns the new array of filtered values.
*/
function baseDifference(array, values, iteratee, comparator) {
var index = -1,
includes = arrayIncludes,
isCommon = true,
length = array.length,
result = [],
valuesLength = values.length;
if (!length) {
return result;
}
if (iteratee) {
values = arrayMap(values, baseUnary(iteratee));
}
if (comparator) {
includes = arrayIncludesWith;
isCommon = false;
}
else if (values.length >= LARGE_ARRAY_SIZE) {
includes = cacheHas;
isCommon = false;
values = new SetCache(values);
}
outer:
while (++index < length) {
var value = array[index],
computed = iteratee == null ? value : iteratee(value);
value = (comparator || value !== 0) ? value : 0;
if (isCommon && computed === computed) {
var valuesIndex = valuesLength;
while (valuesIndex--) {
if (values[valuesIndex] === computed) {
continue outer;
}
}
result.push(value);
}
else if (!includes(values, computed, comparator)) {
result.push(value);
}
}
return result;
}
/**
* The base implementation of `_.forEach` without support for iteratee shorthands.
*
* @private
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @returns {Array|Object} Returns `collection`.
*/
var baseEach = createBaseEach(baseForOwn);
/**
* The base implementation of `_.forEachRight` without support for iteratee shorthands.
*
* @private
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @returns {Array|Object} Returns `collection`.
*/
var baseEachRight = createBaseEach(baseForOwnRight, true);
/**
* The base implementation of `_.every` without support for iteratee shorthands.
*
* @private
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} predicate The function invoked per iteration.
* @returns {boolean} Returns `true` if all elements pass the predicate check,
* else `false`
*/
function baseEvery(collection, predicate) {
var result = true;
baseEach(collection, function(value, index, collection) {
result = !!predicate(value, index, collection);
return result;
});
return result;
}
/**
* The base implementation of methods like `_.max` and `_.min` which accepts a
* `comparator` to determine the extremum value.
*
* @private
* @param {Array} array The array to iterate over.
* @param {Function} iteratee The iteratee invoked per iteration.
* @param {Function} comparator The comparator used to compare values.
* @returns {*} Returns the extremum value.
*/
function baseExtremum(array, iteratee, comparator) {
var index = -1,
length = array.length;
while (++index < length) {
var value = array[index],
current = iteratee(value);
if (current != null && (computed === undefined
? (current === current && !isSymbol(current))
: comparator(current, computed)
)) {
var computed = current,
result = value;
}
}
return result;
}
/**
* The base implementation of `_.fill` without an iteratee call guard.
*
* @private
* @param {Array} array The array to fill.
* @param {*} value The value to fill `array` with.
* @param {number} [start=0] The start position.
* @param {number} [end=array.length] The end position.
* @returns {Array} Returns `array`.
*/
function baseFill(array, value, start, end) {
var length = array.length;
start = toInteger(start);
if (start < 0) {
start = -start > length ? 0 : (length + start);
}
end = (end === undefined || end > length) ? length : toInteger(end);
if (end < 0) {
end += length;
}
end = start > end ? 0 : toLength(end);
while (start < end) {
array[start++] = value;
}
return array;
}
/**
* The base implementation of `_.filter` without support for iteratee shorthands.
*
* @private
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} predicate The function invoked per iteration.
* @returns {Array} Returns the new filtered array.
*/
function baseFilter(collection, predicate) {
var result = [];
baseEach(collection, function(value, index, collection) {
if (predicate(value, index, collection)) {
result.push(value);
}
});
return result;
}
/**
* The base implementation of `_.flatten` with support for restricting flattening.
*
* @private
* @param {Array} array The array to flatten.
* @param {number} depth The maximum recursion depth.
* @param {boolean} [predicate=isFlattenable] The function invoked per iteration.
* @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.
* @param {Array} [result=[]] The initial result value.
* @returns {Array} Returns the new flattened array.
*/
function baseFlatten(array, depth, predicate, isStrict, result) {
var index = -1,
length = array.length;
predicate || (predicate = isFlattenable);
result || (result = []);
while (++index < length) {
var value = array[index];
if (depth > 0 && predicate(value)) {
if (depth > 1) {
// Recursively flatten arrays (susceptible to call stack limits).
baseFlatten(value, depth - 1, predicate, isStrict, result);
} else {
arrayPush(result, value);
}
} else if (!isStrict) {
result[result.length] = value;
}
}
return result;
}
/**
* The base implementation of `baseForOwn` which iterates over `object`
* properties returned by `keysFunc` and invokes `iteratee` for each property.
* Iteratee functions may exit iteration early by explicitly returning `false`.
*
* @private
* @param {Object} object The object to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @param {Function} keysFunc The function to get the keys of `object`.
* @returns {Object} Returns `object`.
*/
var baseFor = createBaseFor();
/**
* This function is like `baseFor` except that it iterates over properties
* in the opposite order.
*
* @private
* @param {Object} object The object to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @param {Function} keysFunc The function to get the keys of `object`.
* @returns {Object} Returns `object`.
*/
var baseForRight = createBaseFor(true);
/**
* The base implementation of `_.forOwn` without support for iteratee shorthands.
*
* @private
* @param {Object} object The object to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @returns {Object} Returns `object`.
*/
function baseForOwn(object, iteratee) {
return object && baseFor(object, iteratee, keys);
}
/**
* The base implementation of `_.forOwnRight` without support for iteratee shorthands.
*
* @private
* @param {Object} object The object to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @returns {Object} Returns `object`.
*/
function baseForOwnRight(object, iteratee) {
return object && baseForRight(object, iteratee, keys);
}
/**
* The base implementation of `_.functions` which creates an array of
* `object` function property names filtered from `props`.
*
* @private
* @param {Object} object The object to inspect.
* @param {Array} props The property names to filter.
* @returns {Array} Returns the function names.
*/
function baseFunctions(object, props) {
return arrayFilter(props, function(key) {
return isFunction(object[key]);
});
}
/**
* The base implementation of `_.get` without support for default values.
*
* @private
* @param {Object} object The object to query.
* @param {Array|string} path The path of the property to get.
* @returns {*} Returns the resolved value.
*/
function baseGet(object, path) {
path = isKey(path, object) ? [path] : castPath(path);
var index = 0,
length = path.length;
while (object != null && index < length) {
object = object[toKey(path[index++])];
}
return (index && index == length) ? object : undefined;
}
/**
* The base implementation of `getAllKeys` and `getAllKeysIn` which uses
* `keysFunc` and `symbolsFunc` to get the enumerable property names and
* symbols of `object`.
*
* @private
* @param {Object} object The object to query.
* @param {Function} keysFunc The function to get the keys of `object`.
* @param {Function} symbolsFunc The function to get the symbols of `object`.
* @returns {Array} Returns the array of property names and symbols.
*/
function baseGetAllKeys(object, keysFunc, symbolsFunc) {
var result = keysFunc(object);
return isArray(object) ? result : arrayPush(result, symbolsFunc(object));
}
/**
* The base implementation of `getTag` without fallbacks for buggy environments.
*
* @private
* @param {*} value The value to query.
* @returns {string} Returns the `toStringTag`.
*/
function baseGetTag(value) {
if (value == null) {
return value === undefined ? undefinedTag : nullTag;
}
value = Object(value);
return (symToStringTag && symToStringTag in value)
? getRawTag(value)
: objectToString(value);
}
/**
* The base implementation of `_.gt` which doesn't coerce arguments.
*
* @private
* @param {*} value The value to compare.
* @param {*} other The other value to compare.
* @returns {boolean} Returns `true` if `value` is greater than `other`,
* else `false`.
*/
function baseGt(value, other) {
return value > other;
}
/**
* The base implementation of `_.has` without support for deep paths.
*
* @private
* @param {Object} [object] The object to query.
* @param {Array|string} key The key to check.
* @returns {boolean} Returns `true` if `key` exists, else `false`.
*/
function baseHas(object, key) {
return object != null && hasOwnProperty.call(object, key);
}
/**
* The base implementation of `_.hasIn` without support for deep paths.
*
* @private
* @param {Object} [object] The object to query.
* @param {Array|string} key The key to check.
* @returns {boolean} Returns `true` if `key` exists, else `false`.
*/
function baseHasIn(object, key) {
return object != null && key in Object(object);
}
/**
* The base implementation of `_.inRange` which doesn't coerce arguments.
*
* @private
* @param {number} number The number to check.
* @param {number} start The start of the range.
* @param {number} end The end of the range.
* @returns {boolean} Returns `true` if `number` is in the range, else `false`.
*/
function baseInRange(number, start, end) {
return number >= nativeMin(start, end) && number < nativeMax(start, end);
}
/**
* The base implementation of methods like `_.intersection`, without support
* for iteratee shorthands, that accepts an array of arrays to inspect.
*
* @private
* @param {Array} arrays The arrays to inspect.
* @param {Function} [iteratee] The iteratee invoked per element.
* @param {Function} [comparator] The comparator invoked per element.
* @returns {Array} Returns the new array of shared values.
*/
function baseIntersection(arrays, iteratee, comparator) {
var includes = comparator ? arrayIncludesWith : arrayIncludes,
length = arrays[0].length,
othLength = arrays.length,
othIndex = othLength,
caches = Array(othLength),
maxLength = Infinity,
result = [];
while (othIndex--) {
var array = arrays[othIndex];
if (othIndex && iteratee) {
array = arrayMap(array, baseUnary(iteratee));
}
maxLength = nativeMin(array.length, maxLength);
caches[othIndex] = !comparator && (iteratee || (length >= 120 && array.length >= 120))
? new SetCache(othIndex && array)
: undefined;
}
array = arrays[0];
var index = -1,
seen = caches[0];
outer:
while (++index < length && result.length < maxLength) {
var value = array[index],
computed = iteratee ? iteratee(value) : value;
value = (comparator || value !== 0) ? value : 0;
if (!(seen
? cacheHas(seen, computed)
: includes(result, computed, comparator)
)) {
othIndex = othLength;
while (--othIndex) {
var cache = caches[othIndex];
if (!(cache
? cacheHas(cache, computed)
: includes(arrays[othIndex], computed, comparator))
) {
continue outer;
}
}
if (seen) {
seen.push(computed);
}
result.push(value);
}
}
return result;
}
/**
* The base implementation of `_.invert` and `_.invertBy` which inverts
* `object` with values transformed by `iteratee` and set by `setter`.
*
* @private
* @param {Object} object The object to iterate over.
* @param {Function} setter The function to set `accumulator` values.
* @param {Function} iteratee The iteratee to transform values.
* @param {Object} accumulator The initial inverted object.
* @returns {Function} Returns `accumulator`.
*/
function baseInverter(object, setter, iteratee, accumulator) {
baseForOwn(object, function(value, key, object) {
setter(accumulator, iteratee(value), key, object);
});
return accumulator;
}
/**
* The base implementation of `_.invoke` without support for individual
* method arguments.
*
* @private
* @param {Object} object The object to query.
* @param {Array|string} path The path of the method to invoke.
* @param {Array} args The arguments to invoke the method with.
* @returns {*} Returns the result of the invoked method.
*/
function baseInvoke(object, path, args) {
if (!isKey(path, object)) {
path = castPath(path);
object = parent(object, path);
path = last(path);
}
var func = object == null ? object : object[toKey(path)];
return func == null ? undefined : apply(func, object, args);
}
/**
* The base implementation of `_.isArguments`.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an `arguments` object,
*/
function baseIsArguments(value) {
return isObjectLike(value) && baseGetTag(value) == argsTag;
}
/**
* The base implementation of `_.isArrayBuffer` without Node.js optimizations.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
*/
function baseIsArrayBuffer(value) {
return isObjectLike(value) && baseGetTag(value) == arrayBufferTag;
}
/**
* The base implementation of `_.isDate` without Node.js optimizations.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a date object, else `false`.
*/
function baseIsDate(value) {
return isObjectLike(value) && baseGetTag(value) == dateTag;
}
/**
* The base implementation of `_.isEqual` which supports partial comparisons
* and tracks traversed objects.
*
* @private
* @param {*} value The value to compare.
* @param {*} other The other value to compare.
* @param {Function} [customizer] The function to customize comparisons.
* @param {boolean} [bitmask] The bitmask of comparison flags.
* The bitmask may be composed of the following flags:
* 1 - Unordered comparison
* 2 - Partial comparison
* @param {Object} [stack] Tracks traversed `value` and `other` objects.
* @returns {boolean} Returns `true` if the values are equivalent, else `false`.
*/
function baseIsEqual(value, other, customizer, bitmask, stack) {
if (value === other) {
return true;
}
if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
return value !== value && other !== other;
}
return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
}
/**
* A specialized version of `baseIsEqual` for arrays and objects which performs
* deep comparisons and tracks traversed objects enabling objects with circular
* references to be compared.
*
* @private
* @param {Object} object The object to compare.
* @param {Object} other The other object to compare.
* @param {Function} equalFunc The function to determine equivalents of values.
* @param {Function} [customizer] The function to customize comparisons.
* @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
* for more details.
* @param {Object} [stack] Tracks traversed `object` and `other` objects.
* @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
*/
function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
var objIsArr = isArray(object),
othIsArr = isArray(other),
objTag = arrayTag,
othTag = arrayTag;
if (!objIsArr) {
objTag = getTag(object);
objTag = objTag == argsTag ? objectTag : objTag;
}
if (!othIsArr) {
othTag = getTag(other);
othTag = othTag == argsTag ? objectTag : othTag;
}
var objIsObj = objTag == objectTag,
othIsObj = othTag == objectTag,
isSameTag = objTag == othTag;
if (isSameTag && isBuffer(object)) {
if (!isBuffer(other)) {
return false;
}
objIsArr = true;
objIsObj = false;
}
if (isSameTag && !objIsObj) {
stack || (stack = new Stack);
return (objIsArr || isTypedArray(object))
? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
: equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
}
if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
if (objIsWrapped || othIsWrapped) {
var objUnwrapped = objIsWrapped ? object.value() : object,
othUnwrapped = othIsWrapped ? other.value() : other;
stack || (stack = new Stack);
return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
}
}
if (!isSameTag) {
return false;
}
stack || (stack = new Stack);
return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
}
/**
* The base implementation of `_.isMap` without Node.js optimizations.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a map, else `false`.
*/
function baseIsMap(value) {
return isObjectLike(value) && getTag(value) == mapTag;
}
/**
* The base implementation of `_.isMatch` without support for iteratee shorthands.
*
* @private
* @param {Object} object The object to inspect.
* @param {Object} source The object of property values to match.
* @param {Array} matchData The property names, values, and compare flags to match.
* @param {Function} [customizer] The function to customize comparisons.
* @returns {boolean} Returns `true` if `object` is a match, else `false`.
*/
function baseIsMatch(object, source, matchData, customizer) {
var index = matchData.length,
length = index,
noCustomizer = !customizer;
if (object == null) {
return !length;
}
object = Object(object);
while (index--) {
var data = matchData[index];
if ((noCustomizer && data[2])
? data[1] !== object[data[0]]
: !(data[0] in object)
) {
return false;
}
}
while (++index < length) {
data = matchData[index];
var key = data[0],
objValue = object[key],
srcValue = data[1];
if (noCustomizer && data[2]) {
if (objValue === undefined && !(key in object)) {
return false;
}
} else {
var stack = new Stack;
if (customizer) {
var result = customizer(objValue, srcValue, key, object, source, stack);
}
if (!(result === undefined
? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
: result
)) {
return false;
}
}
}
return true;
}
/**
* The base implementation of `_.isNative` without bad shim checks.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a native function,
* else `false`.
*/
function baseIsNative(value) {
if (!isObject(value) || isMasked(value)) {
return false;
}
var pattern = isFunction(value) ? reIsNative : reIsHostCtor;
return pattern.test(toSource(value));
}
/**
* The base implementation of `_.isRegExp` without Node.js optimizations.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
*/
function baseIsRegExp(value) {
return isObjectLike(value) && baseGetTag(value) == regexpTag;
}
/**
* The base implementation of `_.isSet` without Node.js optimizations.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a set, else `false`.
*/
function baseIsSet(value) {
return isObjectLike(value) && getTag(value) == setTag;
}
/**
* The base implementation of `_.isTypedArray` without Node.js optimizations.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
*/
function baseIsTypedArray(value) {
return isObjectLike(value) &&
isLength(value.length) && !!typedArrayTags[baseGetTag(value)];
}
/**
* The base implementation of `_.iteratee`.
*
* @private
* @param {*} [value=_.identity] The value to convert to an iteratee.
* @returns {Function} Returns the iteratee.
*/
function baseIteratee(value) {
// Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
// See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
if (typeof value == 'function') {
return value;
}
if (value == null) {
return identity;
}
if (typeof value == 'object') {
return isArray(value)
? baseMatchesProperty(value[0], value[1])
: baseMatches(value);
}
return property(value);
}
/**
* The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
*
* @private
* @param {Object} object The object to query.
* @returns {Array} Returns the array of property names.
*/
function baseKeys(object) {
if (!isPrototype(object)) {
return nativeKeys(object);
}
var result = [];
for (var key in Object(object)) {
if (hasOwnProperty.call(object, key) && key != 'constructor') {
result.push(key);
}
}
return result;
}
/**
* The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.
*
* @private
* @param {Object} object The object to query.
* @returns {Array} Returns the array of property names.
*/
function baseKeysIn(object) {
if (!isObject(object)) {
return nativeKeysIn(object);
}
var isProto = isPrototype(object),
result = [];
for (var key in object) {
if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
result.push(key);
}
}
return result;
}
/**
* The base implementation of `_.lt` which doesn't coerce arguments.
*
* @private
* @param {*} value The value to compare.
* @param {*} other The other value to compare.
* @returns {boolean} Returns `true` if `value` is less than `other`,
* else `false`.
*/
function baseLt(value, other) {
return value < other;
}
/**
* The base implementation of `_.map` without support for iteratee shorthands.
*
* @private
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @returns {Array} Returns the new mapped array.
*/
function baseMap(collection, iteratee) {
var index = -1,
result = isArrayLike(collection) ? Array(collection.length) : [];
baseEach(collection, function(value, key, collection) {
result[++index] = iteratee(value, key, collection);
});
return result;
}
/**
* The base implementation of `_.matches` which doesn't clone `source`.
*
* @private
* @param {Object} source The object of property values to match.
* @returns {Function} Returns the new spec function.
*/
function baseMatches(source) {
var matchData = getMatchData(source);
if (matchData.length == 1 && matchData[0][2]) {
return matchesStrictComparable(matchData[0][0], matchData[0][1]);
}
return function(object) {
return object === source || baseIsMatch(object, source, matchData);
};
}
/**
* The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
*
* @private
* @param {string} path The path of the property to get.
* @param {*} srcValue The value to match.
* @returns {Function} Returns the new spec function.
*/
function baseMatchesProperty(path, srcValue) {
if (isKey(path) && isStrictComparable(srcValue)) {
return matchesStrictComparable(toKey(path), srcValue);
}
return function(object) {
var objValue = get(object, path);
return (objValue === undefined && objValue === srcValue)
? hasIn(object, path)
: baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
};
}
/**
* The base implementation of `_.merge` without support for multiple sources.
*
* @private
* @param {Object} object The destination object.
* @param {Object} source The source object.
* @param {number} srcIndex The index of `source`.
* @param {Function} [customizer] The function to customize merged values.
* @param {Object} [stack] Tracks traversed source values and their merged
* counterparts.
*/
function baseMerge(object, source, srcIndex, customizer, stack) {
if (object === source) {
return;
}
baseFor(source, function(srcValue, key) {
if (isObject(srcValue)) {
stack || (stack = new Stack);
baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
}
else {
var newValue = customizer
? customizer(object[key], srcValue, (key + ''), object, source, stack)
: undefined;
if (newValue === undefined) {
newValue = srcValue;
}
assignMergeValue(object, key, newValue);
}
}, keysIn);
}
/**
* A specialized version of `baseMerge` for arrays and objects which performs
* deep merges and tracks traversed objects enabling objects with circular
* references to be merged.
*
* @private
* @param {Object} object The destination object.
* @param {Object} source The source object.
* @param {string} key The key of the value to merge.
* @param {number} srcIndex The index of `source`.
* @param {Function} mergeFunc The function to merge values.
* @param {Function} [customizer] The function to customize assigned values.
* @param {Object} [stack] Tracks traversed source values and their merged
* counterparts.
*/
function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {
var objValue = object[key],
srcValue = source[key],
stacked = stack.get(srcValue);
if (stacked) {
assignMergeValue(object, key, stacked);
return;
}
var newValue = customizer
? customizer(objValue, srcValue, (key + ''), object, source, stack)
: undefined;
var isCommon = newValue === undefined;
if (isCommon) {
var isArr = isArray(srcValue),
isBuff = !isArr && isBuffer(srcValue),
isTyped = !isArr && !isBuff && isTypedArray(srcValue);
newValue = srcValue;
if (isArr || isBuff || isTyped) {
if (isArray(objValue)) {
newValue = objValue;
}
else if (isArrayLikeObject(objValue)) {
newValue = copyArray(objValue);
}
else if (isBuff) {
isCommon = false;
newValue = cloneBuffer(srcValue, true);
}
else if (isTyped) {
isCommon = false;
newValue = cloneTypedArray(srcValue, true);
}
else {
newValue = [];
}
}
else if (isPlainObject(srcValue) || isArguments(srcValue)) {
newValue = objValue;
if (isArguments(objValue)) {
newValue = toPlainObject(objValue);
}
else if (!isObject(objValue) || (srcIndex && isFunction(objValue))) {
newValue = initCloneObject(srcValue);
}
}
else {
isCommon = false;
}
}
if (isCommon) {
// Recursively merge objects and arrays (susceptible to call stack limits).
stack.set(srcValue, newValue);
mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
stack['delete'](srcValue);
}
assignMergeValue(object, key, newValue);
}
/**
* The base implementation of `_.nth` which doesn't coerce arguments.
*
* @private
* @param {Array} array The array to query.
* @param {number} n The index of the element to return.
* @returns {*} Returns the nth element of `array`.
*/
function baseNth(array, n) {
var length = array.length;
if (!length) {
return;
}
n += n < 0 ? length : 0;
return isIndex(n, length) ? array[n] : undefined;
}
/**
* The base implementation of `_.orderBy` without param guards.
*
* @private
* @param {Array|Object} collection The collection to iterate over.
* @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.
* @param {string[]} orders The sort orders of `iteratees`.
* @returns {Array} Returns the new sorted array.
*/
function baseOrderBy(collection, iteratees, orders) {
var index = -1;
iteratees = arrayMap(iteratees.length ? iteratees : [identity], baseUnary(getIteratee()));
var result = baseMap(collection, function(value, key, collection) {
var criteria = arrayMap(iteratees, function(iteratee) {
return iteratee(value);
});
return { 'criteria': criteria, 'index': ++index, 'value': value };
});
return baseSortBy(result, function(object, other) {
return compareMultiple(object, other, orders);
});
}
/**
* The base implementation of `_.pick` without support for individual
* property identifiers.
*
* @private
* @param {Object} object The source object.
* @param {string[]} props The property identifiers to pick.
* @returns {Object} Returns the new object.
*/
function basePick(object, props) {
object = Object(object);
return basePickBy(object, props, function(value, key) {
return key in object;
});
}
/**
* The base implementation of `_.pickBy` without support for iteratee shorthands.
*
* @private
* @param {Object} object The source object.
* @param {string[]} props The property identifiers to pick from.
* @param {Function} predicate The function invoked per property.
* @returns {Object} Returns the new object.
*/
function basePickBy(object, props, predicate) {
var index = -1,
length = props.length,
result = {};
while (++index < length) {
var key = props[index],
value = object[key];
if (predicate(value, key)) {
baseAssignValue(result, key, value);
}
}
return result;
}
/**
* A specialized version of `baseProperty` which supports deep paths.
*
* @private
* @param {Array|string} path The path of the property to get.
* @returns {Function} Returns the new accessor function.
*/
function basePropertyDeep(path) {
return function(object) {
return baseGet(object, path);
};
}
/**
* The base implementation of `_.pullAllBy` without support for iteratee
* shorthands.
*
* @private
* @param {Array} array The array to modify.
* @param {Array} values The values to remove.
* @param {Function} [iteratee] The iteratee invoked per element.
* @param {Function} [comparator] The comparator invoked per element.
* @returns {Array} Returns `array`.
*/
function basePullAll(array, values, iteratee, comparator) {
var indexOf = comparator ? baseIndexOfWith : baseIndexOf,
index = -1,
length = values.length,
seen = array;
if (array === values) {
values = copyArray(values);
}
if (iteratee) {
seen = arrayMap(array, baseUnary(iteratee));
}
while (++index < length) {
var fromIndex = 0,
value = values[index],
computed = iteratee ? iteratee(value) : value;
while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) {
if (seen !== array) {
splice.call(seen, fromIndex, 1);
}
splice.call(array, fromIndex, 1);
}
}
return array;
}
/**
* The base implementation of `_.pullAt` without support for individual
* indexes or capturing the removed elements.
*
* @private
* @param {Array} array The array to modify.
* @param {number[]} indexes The indexes of elements to remove.
* @returns {Array} Returns `array`.
*/
function basePullAt(array, indexes) {
var length = array ? indexes.length : 0,
lastIndex = length - 1;
while (length--) {
var index = indexes[length];
if (length == lastIndex || index !== previous) {
var previous = index;
if (isIndex(index)) {
splice.call(array, index, 1);
}
else if (!isKey(index, array)) {
var path = castPath(index),
object = parent(array, path);
if (object != null) {
delete object[toKey(last(path))];
}
}
else {
delete array[toKey(index)];
}
}
}
return array;
}
/**
* The base implementation of `_.random` without support for returning
* floating-point numbers.
*
* @private
* @param {number} lower The lower bound.
* @param {number} upper The upper bound.
* @returns {number} Returns the random number.
*/
function baseRandom(lower, upper) {
return lower + nativeFloor(nativeRandom() * (upper - lower + 1));
}
/**
* The base implementation of `_.range` and `_.rangeRight` which doesn't
* coerce arguments.
*
* @private
* @param {number} start The start of the range.
* @param {number} end The end of the range.
* @param {number} step The value to increment or decrement by.
* @param {boolean} [fromRight] Specify iterating from right to left.
* @returns {Array} Returns the range of numbers.
*/
function baseRange(start, end, step, fromRight) {
var index = -1,
length = nativeMax(nativeCeil((end - start) / (step || 1)), 0),
result = Array(length);
while (length--) {
result[fromRight ? length : ++index] = start;
start += step;
}
return result;
}
/**
* The base implementation of `_.repeat` which doesn't coerce arguments.
*
* @private
* @param {string} string The string to repeat.
* @param {number} n The number of times to repeat the string.
* @returns {string} Returns the repeated string.
*/
function baseRepeat(string, n) {
var result = '';
if (!string || n < 1 || n > MAX_SAFE_INTEGER) {
return result;
}
// Leverage the exponentiation by squaring algorithm for a faster repeat.
// See https://en.wikipedia.org/wiki/Exponentiation_by_squaring for more details.
do {
if (n % 2) {
result += string;
}
n = nativeFloor(n / 2);
if (n) {
string += string;
}
} while (n);
return result;
}
/**
* The base implementation of `_.rest` which doesn't validate or coerce arguments.
*
* @private
* @param {Function} func The function to apply a rest parameter to.
* @param {number} [start=func.length-1] The start position of the rest parameter.
* @returns {Function} Returns the new function.
*/
function baseRest(func, start) {
return setToString(overRest(func, start, identity), func + '');
}
/**
* The base implementation of `_.sample`.
*
* @private
* @param {Array|Object} collection The collection to sample.
* @returns {*} Returns the random element.
*/
function baseSample(collection) {
return arraySample(values(collection));
}
/**
* The base implementation of `_.sampleSize` without param guards.
*
* @private
* @param {Array|Object} collection The collection to sample.
* @param {number} n The number of elements to sample.
* @returns {Array} Returns the random elements.
*/
function baseSampleSize(collection, n) {
var array = values(collection);
return shuffleSelf(array, baseClamp(n, 0, array.length));
}
/**
* The base implementation of `_.set`.
*
* @private
* @param {Object} object The object to modify.
* @param {Array|string} path The path of the property to set.
* @param {*} value The value to set.
* @param {Function} [customizer] The function to customize path creation.
* @returns {Object} Returns `object`.
*/
function baseSet(object, path, value, customizer) {
if (!isObject(object)) {
return object;
}
path = isKey(path, object) ? [path] : castPath(path);
var index = -1,
length = path.length,
lastIndex = length - 1,
nested = object;
while (nested != null && ++index < length) {
var key = toKey(path[index]),
newValue = value;
if (index != lastIndex) {
var objValue = nested[key];
newValue = customizer ? customizer(objValue, key, nested) : undefined;
if (newValue === undefined) {
newValue = isObject(objValue)
? objValue
: (isIndex(path[index + 1]) ? [] : {});
}
}
assignValue(nested, key, newValue);
nested = nested[key];
}
return object;
}
/**
* The base implementation of `setData` without support for hot loop shorting.
*
* @private
* @param {Function} func The function to associate metadata with.
* @param {*} data The metadata.
* @returns {Function} Returns `func`.
*/
var baseSetData = !metaMap ? identity : function(func, data) {
metaMap.set(func, data);
return func;
};
/**
* The base implementation of `setToString` without support for hot loop shorting.
*
* @private
* @param {Function} func The function to modify.
* @param {Function} string The `toString` result.
* @returns {Function} Returns `func`.
*/
var baseSetToString = !defineProperty ? identity : function(func, string) {
return defineProperty(func, 'toString', {
'configurable': true,
'enumerable': false,
'value': constant(string),
'writable': true
});
};
/**
* The base implementation of `_.shuffle`.
*
* @private
* @param {Array|Object} collection The collection to shuffle.
* @returns {Array} Returns the new shuffled array.
*/
function baseShuffle(collection) {
return shuffleSelf(values(collection));
}
/**
* The base implementation of `_.slice` without an iteratee call guard.
*
* @private
* @param {Array} array The array to slice.
* @param {number} [start=0] The start position.
* @param {number} [end=array.length] The end position.
* @returns {Array} Returns the slice of `array`.
*/
function baseSlice(array, start, end) {
var index = -1,
length = array.length;
if (start < 0) {
start = -start > length ? 0 : (length + start);
}
end = end > length ? length : end;
if (end < 0) {
end += length;
}
length = start > end ? 0 : ((end - start) >>> 0);
start >>>= 0;
var result = Array(length);
while (++index < length) {
result[index] = array[index + start];
}
return result;
}
/**
* The base implementation of `_.some` without support for iteratee shorthands.
*
* @private
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} predicate The function invoked per iteration.
* @returns {boolean} Returns `true` if any element passes the predicate check,
* else `false`.
*/
function baseSome(collection, predicate) {
var result;
baseEach(collection, function(value, index, collection) {
result = predicate(value, index, collection);
return !result;
});
return !!result;
}
/**
* The base implementation of `_.sortedIndex` and `_.sortedLastIndex` which
* performs a binary search of `array` to determine the index at which `value`
* should be inserted into `array` in order to maintain its sort order.
*
* @private
* @param {Array} array The sorted array to inspect.
* @param {*} value The value to evaluate.
* @param {boolean} [retHighest] Specify returning the highest qualified index.
* @returns {number} Returns the index at which `value` should be inserted
* into `array`.
*/
function baseSortedIndex(array, value, retHighest) {
var low = 0,
high = array == null ? low : array.length;
if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) {
while (low < high) {
var mid = (low + high) >>> 1,
computed = array[mid];
if (computed !== null && !isSymbol(computed) &&
(retHighest ? (computed <= value) : (computed < value))) {
low = mid + 1;
} else {
high = mid;
}
}
return high;
}
return baseSortedIndexBy(array, value, identity, retHighest);
}
/**
* The base implementation of `_.sortedIndexBy` and `_.sortedLastIndexBy`
* which invokes `iteratee` for `value` and each element of `array` to compute
* their sort ranking. The iteratee is invoked with one argument; (value).
*
* @private
* @param {Array} array The sorted array to inspect.
* @param {*} value The value to evaluate.
* @param {Function} iteratee The iteratee invoked per element.
* @param {boolean} [retHighest] Specify returning the highest qualified index.
* @returns {number} Returns the index at which `value` should be inserted
* into `array`.
*/
function baseSortedIndexBy(array, value, iteratee, retHighest) {
value = iteratee(value);
var low = 0,
high = array == null ? 0 : array.length,
valIsNaN = value !== value,
valIsNull = value === null,
valIsSymbol = isSymbol(value),
valIsUndefined = value === undefined;
while (low < high) {
var mid = nativeFloor((low + high) / 2),
computed = iteratee(array[mid]),
othIsDefined = computed !== undefined,
othIsNull = computed === null,
othIsReflexive = computed === computed,
othIsSymbol = isSymbol(computed);
if (valIsNaN) {
var setLow = retHighest || othIsReflexive;
} else if (valIsUndefined) {
setLow = othIsReflexive && (retHighest || othIsDefined);
} else if (valIsNull) {
setLow = othIsReflexive && othIsDefined && (retHighest || !othIsNull);
} else if (valIsSymbol) {
setLow = othIsReflexive && othIsDefined && !othIsNull && (retHighest || !othIsSymbol);
} else if (othIsNull || othIsSymbol) {
setLow = false;
} else {
setLow = retHighest ? (computed <= value) : (computed < value);
}
if (setLow) {
low = mid + 1;
} else {
high = mid;
}
}
return nativeMin(high, MAX_ARRAY_INDEX);
}
/**
* The base implementation of `_.sortedUniq` and `_.sortedUniqBy` without
* support for iteratee shorthands.
*
* @private
* @param {Array} array The array to inspect.
* @param {Function} [iteratee] The iteratee invoked per element.
* @returns {Array} Returns the new duplicate free array.
*/
function baseSortedUniq(array, iteratee) {
var index = -1,
length = array.length,
resIndex = 0,
result = [];
while (++index < length) {
var value = array[index],
computed = iteratee ? iteratee(value) : value;
if (!index || !eq(computed, seen)) {
var seen = computed;
result[resIndex++] = value === 0 ? 0 : value;
}
}
return result;
}
/**
* The base implementation of `_.toNumber` which doesn't ensure correct
* conversions of binary, hexadecimal, or octal string values.
*
* @private
* @param {*} value The value to process.
* @returns {number} Returns the number.
*/
function baseToNumber(value) {
if (typeof value == 'number') {
return value;
}
if (isSymbol(value)) {
return NAN;
}
return +value;
}
/**
* The base implementation of `_.toString` which doesn't convert nullish
* values to empty strings.
*
* @private
* @param {*} value The value to process.
* @returns {string} Returns the string.
*/
function baseToString(value) {
// Exit early for strings to avoid a performance hit in some environments.
if (typeof value == 'string') {
return value;
}
if (isArray(value)) {
// Recursively convert values (susceptible to call stack limits).
return arrayMap(value, baseToString) + '';
}
if (isSymbol(value)) {
return symbolToString ? symbolToString.call(value) : '';
}
var result = (value + '');
return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
}
/**
* The base implementation of `_.uniqBy` without support for iteratee shorthands.
*
* @private
* @param {Array} array The array to inspect.
* @param {Function} [iteratee] The iteratee invoked per element.
* @param {Function} [comparator] The comparator invoked per element.
* @returns {Array} Returns the new duplicate free array.
*/
function baseUniq(array, iteratee, comparator) {
var index = -1,
includes = arrayIncludes,
length = array.length,
isCommon = true,
result = [],
seen = result;
if (comparator) {
isCommon = false;
includes = arrayIncludesWith;
}
else if (length >= LARGE_ARRAY_SIZE) {
var set = iteratee ? null : createSet(array);
if (set) {
return setToArray(set);
}
isCommon = false;
includes = cacheHas;
seen = new SetCache;
}
else {
seen = iteratee ? [] : result;
}
outer:
while (++index < length) {
var value = array[index],
computed = iteratee ? iteratee(value) : value;
value = (comparator || value !== 0) ? value : 0;
if (isCommon && computed === computed) {
var seenIndex = seen.length;
while (seenIndex--) {
if (seen[seenIndex] === computed) {
continue outer;
}
}
if (iteratee) {
seen.push(computed);
}
result.push(value);
}
else if (!includes(seen, computed, comparator)) {
if (seen !== result) {
seen.push(computed);
}
result.push(value);
}
}
return result;
}
/**
* The base implementation of `_.unset`.
*
* @private
* @param {Object} object The object to modify.
* @param {Array|string} path The path of the property to unset.
* @returns {boolean} Returns `true` if the property is deleted, else `false`.
*/
function baseUnset(object, path) {
path = isKey(path, object) ? [path] : castPath(path);
object = parent(object, path);
var key = toKey(last(path));
return !(object != null && hasOwnProperty.call(object, key)) || delete object[key];
}
/**
* The base implementation of `_.update`.
*
* @private
* @param {Object} object The object to modify.
* @param {Array|string} path The path of the property to update.
* @param {Function} updater The function to produce the updated value.
* @param {Function} [customizer] The function to customize path creation.
* @returns {Object} Returns `object`.
*/
function baseUpdate(object, path, updater, customizer) {
return baseSet(object, path, updater(baseGet(object, path)), customizer);
}
/**
* The base implementation of methods like `_.dropWhile` and `_.takeWhile`
* without support for iteratee shorthands.
*
* @private
* @param {Array} array The array to query.
* @param {Function} predicate The function invoked per iteration.
* @param {boolean} [isDrop] Specify dropping elements instead of taking them.
* @param {boolean} [fromRight] Specify iterating from right to left.
* @returns {Array} Returns the slice of `array`.
*/
function baseWhile(array, predicate, isDrop, fromRight) {
var length = array.length,
index = fromRight ? length : -1;
while ((fromRight ? index-- : ++index < length) &&
predicate(array[index], index, array)) {}
return isDrop
? baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length))
: baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));
}
/**
* The base implementation of `wrapperValue` which returns the result of
* performing a sequence of actions on the unwrapped `value`, where each
* successive action is supplied the return value of the previous.
*
* @private
* @param {*} value The unwrapped value.
* @param {Array} actions Actions to perform to resolve the unwrapped value.
* @returns {*} Returns the resolved value.
*/
function baseWrapperValue(value, actions) {
var result = value;
if (result instanceof LazyWrapper) {
result = result.value();
}
return arrayReduce(actions, function(result, action) {
return action.func.apply(action.thisArg, arrayPush([result], action.args));
}, result);
}
/**
* The base implementation of methods like `_.xor`, without support for
* iteratee shorthands, that accepts an array of arrays to inspect.
*
* @private
* @param {Array} arrays The arrays to inspect.
* @param {Function} [iteratee] The iteratee invoked per element.
* @param {Function} [comparator] The comparator invoked per element.
* @returns {Array} Returns the new array of values.
*/
function baseXor(arrays, iteratee, comparator) {
var length = arrays.length;
if (length < 2) {
return length ? baseUniq(arrays[0]) : [];
}
var index = -1,
result = Array(length);
while (++index < length) {
var array = arrays[index],
othIndex = -1;
while (++othIndex < length) {
if (othIndex != index) {
result[index] = baseDifference(result[index] || array, arrays[othIndex], iteratee, comparator);
}
}
}
return baseUniq(baseFlatten(result, 1), iteratee, comparator);
}
/**
* This base implementation of `_.zipObject` which assigns values using `assignFunc`.
*
* @private
* @param {Array} props The property identifiers.
* @param {Array} values The property values.
* @param {Function} assignFunc The function to assign values.
* @returns {Object} Returns the new object.
*/
function baseZipObject(props, values, assignFunc) {
var index = -1,
length = props.length,
valsLength = values.length,
result = {};
while (++index < length) {
var value = index < valsLength ? values[index] : undefined;
assignFunc(result, props[index], value);
}
return result;
}
/**
* Casts `value` to an empty array if it's not an array like object.
*
* @private
* @param {*} value The value to inspect.
* @returns {Array|Object} Returns the cast array-like object.
*/
function castArrayLikeObject(value) {
return isArrayLikeObject(value) ? value : [];
}
/**
* Casts `value` to `identity` if it's not a function.
*
* @private
* @param {*} value The value to inspect.
* @returns {Function} Returns cast function.
*/
function castFunction(value) {
return typeof value == 'function' ? value : identity;
}
/**
* Casts `value` to a path array if it's not one.
*
* @private
* @param {*} value The value to inspect.
* @returns {Array} Returns the cast property path array.
*/
function castPath(value) {
return isArray(value) ? value : stringToPath(value);
}
/**
* A `baseRest` alias which can be replaced with `identity` by module
* replacement plugins.
*
* @private
* @type {Function}
* @param {Function} func The function to apply a rest parameter to.
* @returns {Function} Returns the new function.
*/
var castRest = baseRest;
/**
* Casts `array` to a slice if it's needed.
*
* @private
* @param {Array} array The array to inspect.
* @param {number} start The start position.
* @param {number} [end=array.length] The end position.
* @returns {Array} Returns the cast slice.
*/
function castSlice(array, start, end) {
var length = array.length;
end = end === undefined ? length : end;
return (!start && end >= length) ? array : baseSlice(array, start, end);
}
/**
* A simple wrapper around the global [`clearTimeout`](https://mdn.io/clearTimeout).
*
* @private
* @param {number|Object} id The timer id or timeout object of the timer to clear.
*/
var clearTimeout = ctxClearTimeout || function(id) {
return root.clearTimeout(id);
};
/**
* Creates a clone of `buffer`.
*
* @private
* @param {Buffer} buffer The buffer to clone.
* @param {boolean} [isDeep] Specify a deep clone.
* @returns {Buffer} Returns the cloned buffer.
*/
function cloneBuffer(buffer, isDeep) {
if (isDeep) {
return buffer.slice();
}
var length = buffer.length,
result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);
buffer.copy(result);
return result;
}
/**
* Creates a clone of `arrayBuffer`.
*
* @private
* @param {ArrayBuffer} arrayBuffer The array buffer to clone.
* @returns {ArrayBuffer} Returns the cloned array buffer.
*/
function cloneArrayBuffer(arrayBuffer) {
var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
new Uint8Array(result).set(new Uint8Array(arrayBuffer));
return result;
}
/**
* Creates a clone of `dataView`.
*
* @private
* @param {Object} dataView The data view to clone.
* @param {boolean} [isDeep] Specify a deep clone.
* @returns {Object} Returns the cloned data view.
*/
function cloneDataView(dataView, isDeep) {
var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;
return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
}
/**
* Creates a clone of `map`.
*
* @private
* @param {Object} map The map to clone.
* @param {Function} cloneFunc The function to clone values.
* @param {boolean} [isDeep] Specify a deep clone.
* @returns {Object} Returns the cloned map.
*/
function cloneMap(map, isDeep, cloneFunc) {
var array = isDeep ? cloneFunc(mapToArray(map), true) : mapToArray(map);
return arrayReduce(array, addMapEntry, new map.constructor);
}
/**
* Creates a clone of `regexp`.
*
* @private
* @param {Object} regexp The regexp to clone.
* @returns {Object} Returns the cloned regexp.
*/
function cloneRegExp(regexp) {
var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
result.lastIndex = regexp.lastIndex;
return result;
}
/**
* Creates a clone of `set`.
*
* @private
* @param {Object} set The set to clone.
* @param {Function} cloneFunc The function to clone values.
* @param {boolean} [isDeep] Specify a deep clone.
* @returns {Object} Returns the cloned set.
*/
function cloneSet(set, isDeep, cloneFunc) {
var array = isDeep ? cloneFunc(setToArray(set), true) : setToArray(set);
return arrayReduce(array, addSetEntry, new set.constructor);
}
/**
* Creates a clone of the `symbol` object.
*
* @private
* @param {Object} symbol The symbol object to clone.
* @returns {Object} Returns the cloned symbol object.
*/
function cloneSymbol(symbol) {
return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
}
/**
* Creates a clone of `typedArray`.
*
* @private
* @param {Object} typedArray The typed array to clone.
* @param {boolean} [isDeep] Specify a deep clone.
* @returns {Object} Returns the cloned typed array.
*/
function cloneTypedArray(typedArray, isDeep) {
var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
}
/**
* Compares values to sort them in ascending order.
*
* @private
* @param {*} value The value to compare.
* @param {*} other The other value to compare.
* @returns {number} Returns the sort order indicator for `value`.
*/
function compareAscending(value, other) {
if (value !== other) {
var valIsDefined = value !== undefined,
valIsNull = value === null,
valIsReflexive = value === value,
valIsSymbol = isSymbol(value);
var othIsDefined = other !== undefined,
othIsNull = other === null,
othIsReflexive = other === other,
othIsSymbol = isSymbol(other);
if ((!othIsNull && !othIsSymbol && !valIsSymbol && value > other) ||
(valIsSymbol && othIsDefined && othIsReflexive && !othIsNull && !othIsSymbol) ||
(valIsNull && othIsDefined && othIsReflexive) ||
(!valIsDefined && othIsReflexive) ||
!valIsReflexive) {
return 1;
}
if ((!valIsNull && !valIsSymbol && !othIsSymbol && value < other) ||
(othIsSymbol && valIsDefined && valIsReflexive && !valIsNull && !valIsSymbol) ||
(othIsNull && valIsDefined && valIsReflexive) ||
(!othIsDefined && valIsReflexive) ||
!othIsReflexive) {
return -1;
}
}
return 0;
}
/**
* Used by `_.orderBy` to compare multiple properties of a value to another
* and stable sort them.
*
* If `orders` is unspecified, all values are sorted in ascending order. Otherwise,
* specify an order of "desc" for descending or "asc" for ascending sort order
* of corresponding values.
*
* @private
* @param {Object} object The object to compare.
* @param {Object} other The other object to compare.
* @param {boolean[]|string[]} orders The order to sort by for each property.
* @returns {number} Returns the sort order indicator for `object`.
*/
function compareMultiple(object, other, orders) {
var index = -1,
objCriteria = object.criteria,
othCriteria = other.criteria,
length = objCriteria.length,
ordersLength = orders.length;
while (++index < length) {
var result = compareAscending(objCriteria[index], othCriteria[index]);
if (result) {
if (index >= ordersLength) {
return result;
}
var order = orders[index];
return result * (order == 'desc' ? -1 : 1);
}
}
// Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
// that causes it, under certain circumstances, to provide the same value for
// `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247
// for more details.
//
// This also ensures a stable sort in V8 and other engines.
// See https://bugs.chromium.org/p/v8/issues/detail?id=90 for more details.
return object.index - other.index;
}
/**
* Creates an array that is the composition of partially applied arguments,
* placeholders, and provided arguments into a single array of arguments.
*
* @private
* @param {Array} args The provided arguments.
* @param {Array} partials The arguments to prepend to those provided.
* @param {Array} holders The `partials` placeholder indexes.
* @params {boolean} [isCurried] Specify composing for a curried function.
* @returns {Array} Returns the new array of composed arguments.
*/
function composeArgs(args, partials, holders, isCurried) {
var argsIndex = -1,
argsLength = args.length,
holdersLength = holders.length,
leftIndex = -1,
leftLength = partials.length,
rangeLength = nativeMax(argsLength - holdersLength, 0),
result = Array(leftLength + rangeLength),
isUncurried = !isCurried;
while (++leftIndex < leftLength) {
result[leftIndex] = partials[leftIndex];
}
while (++argsIndex < holdersLength) {
if (isUncurried || argsIndex < argsLength) {
result[holders[argsIndex]] = args[argsIndex];
}
}
while (rangeLength--) {
result[leftIndex++] = args[argsIndex++];
}
return result;
}
/**
* This function is like `composeArgs` except that the arguments composition
* is tailored for `_.partialRight`.
*
* @private
* @param {Array} args The provided arguments.
* @param {Array} partials The arguments to append to those provided.
* @param {Array} holders The `partials` placeholder indexes.
* @params {boolean} [isCurried] Specify composing for a curried function.
* @returns {Array} Returns the new array of composed arguments.
*/
function composeArgsRight(args, partials, holders, isCurried) {
var argsIndex = -1,
argsLength = args.length,
holdersIndex = -1,
holdersLength = holders.length,
rightIndex = -1,
rightLength = partials.length,
rangeLength = nativeMax(argsLength - holdersLength, 0),
result = Array(rangeLength + rightLength),
isUncurried = !isCurried;
while (++argsIndex < rangeLength) {
result[argsIndex] = args[argsIndex];
}
var offset = argsIndex;
while (++rightIndex < rightLength) {
result[offset + rightIndex] = partials[rightIndex];
}
while (++holdersIndex < holdersLength) {
if (isUncurried || argsIndex < argsLength) {
result[offset + holders[holdersIndex]] = args[argsIndex++];
}
}
return result;
}
/**
* Copies the values of `source` to `array`.
*
* @private
* @param {Array} source The array to copy values from.
* @param {Array} [array=[]] The array to copy values to.
* @returns {Array} Returns `array`.
*/
function copyArray(source, array) {
var index = -1,
length = source.length;
array || (array = Array(length));
while (++index < length) {
array[index] = source[index];
}
return array;
}
/**
* Copies properties of `source` to `object`.
*
* @private
* @param {Object} source The object to copy properties from.
* @param {Array} props The property identifiers to copy.
* @param {Object} [object={}] The object to copy properties to.
* @param {Function} [customizer] The function to customize copied values.
* @returns {Object} Returns `object`.
*/
function copyObject(source, props, object, customizer) {
var isNew = !object;
object || (object = {});
var index = -1,
length = props.length;
while (++index < length) {
var key = props[index];
var newValue = customizer
? customizer(object[key], source[key], key, object, source)
: undefined;
if (newValue === undefined) {
newValue = source[key];
}
if (isNew) {
baseAssignValue(object, key, newValue);
} else {
assignValue(object, key, newValue);
}
}
return object;
}
/**
* Copies own symbol properties of `source` to `object`.
*
* @private
* @param {Object} source The object to copy symbols from.
* @param {Object} [object={}] The object to copy symbols to.
* @returns {Object} Returns `object`.
*/
function copySymbols(source, object) {
return copyObject(source, getSymbols(source), object);
}
/**
* Creates a function like `_.groupBy`.
*
* @private
* @param {Function} setter The function to set accumulator values.
* @param {Function} [initializer] The accumulator object initializer.
* @returns {Function} Returns the new aggregator function.
*/
function createAggregator(setter, initializer) {
return function(collection, iteratee) {
var func = isArray(collection) ? arrayAggregator : baseAggregator,
accumulator = initializer ? initializer() : {};
return func(collection, setter, getIteratee(iteratee, 2), accumulator);
};
}
/**
* Creates a function like `_.assign`.
*
* @private
* @param {Function} assigner The function to assign values.
* @returns {Function} Returns the new assigner function.
*/
function createAssigner(assigner) {
return baseRest(function(object, sources) {
var index = -1,
length = sources.length,
customizer = length > 1 ? sources[length - 1] : undefined,
guard = length > 2 ? sources[2] : undefined;
customizer = (assigner.length > 3 && typeof customizer == 'function')
? (length--, customizer)
: undefined;
if (guard && isIterateeCall(sources[0], sources[1], guard)) {
customizer = length < 3 ? undefined : customizer;
length = 1;
}
object = Object(object);
while (++index < length) {
var source = sources[index];
if (source) {
assigner(object, source, index, customizer);
}
}
return object;
});
}
/**
* Creates a `baseEach` or `baseEachRight` function.
*
* @private
* @param {Function} eachFunc The function to iterate over a collection.
* @param {boolean} [fromRight] Specify iterating from right to left.
* @returns {Function} Returns the new base function.
*/
function createBaseEach(eachFunc, fromRight) {
return function(collection, iteratee) {
if (collection == null) {
return collection;
}
if (!isArrayLike(collection)) {
return eachFunc(collection, iteratee);
}
var length = collection.length,
index = fromRight ? length : -1,
iterable = Object(collection);
while ((fromRight ? index-- : ++index < length)) {
if (iteratee(iterable[index], index, iterable) === false) {
break;
}
}
return collection;
};
}
/**
* Creates a base function for methods like `_.forIn` and `_.forOwn`.
*
* @private
* @param {boolean} [fromRight] Specify iterating from right to left.
* @returns {Function} Returns the new base function.
*/
function createBaseFor(fromRight) {
return function(object, iteratee, keysFunc) {
var index = -1,
iterable = Object(object),
props = keysFunc(object),
length = props.length;
while (length--) {
var key = props[fromRight ? length : ++index];
if (iteratee(iterable[key], key, iterable) === false) {
break;
}
}
return object;
};
}
/**
* Creates a function that wraps `func` to invoke it with the optional `this`
* binding of `thisArg`.
*
* @private
* @param {Function} func The function to wrap.
* @param {number} bitmask The bitmask flags. See `createWrap` for more details.
* @param {*} [thisArg] The `this` binding of `func`.
* @returns {Function} Returns the new wrapped function.
*/
function createBind(func, bitmask, thisArg) {
var isBind = bitmask & BIND_FLAG,
Ctor = createCtor(func);
function wrapper() {
var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
return fn.apply(isBind ? thisArg : this, arguments);
}
return wrapper;
}
/**
* Creates a function like `_.lowerFirst`.
*
* @private
* @param {string} methodName The name of the `String` case method to use.
* @returns {Function} Returns the new case function.
*/
function createCaseFirst(methodName) {
return function(string) {
string = toString(string);
var strSymbols = hasUnicode(string)
? stringToArray(string)
: undefined;
var chr = strSymbols
? strSymbols[0]
: string.charAt(0);
var trailing = strSymbols
? castSlice(strSymbols, 1).join('')
: string.slice(1);
return chr[methodName]() + trailing;
};
}
/**
* Creates a function like `_.camelCase`.
*
* @private
* @param {Function} callback The function to combine each word.
* @returns {Function} Returns the new compounder function.
*/
function createCompounder(callback) {
return function(string) {
return arrayReduce(words(deburr(string).replace(reApos, '')), callback, '');
};
}
/**
* Creates a function that produces an instance of `Ctor` regardless of
* whether it was invoked as part of a `new` expression or by `call` or `apply`.
*
* @private
* @param {Function} Ctor The constructor to wrap.
* @returns {Function} Returns the new wrapped function.
*/
function createCtor(Ctor) {
return function() {
// Use a `switch` statement to work with class constructors. See
// http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
// for more details.
var args = arguments;
switch (args.length) {
case 0: return new Ctor;
case 1: return new Ctor(args[0]);
case 2: return new Ctor(args[0], args[1]);
case 3: return new Ctor(args[0], args[1], args[2]);
case 4: return new Ctor(args[0], args[1], args[2], args[3]);
case 5: return new Ctor(args[0], args[1], args[2], args[3], args[4]);
case 6: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]);
case 7: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]);
}
var thisBinding = baseCreate(Ctor.prototype),
result = Ctor.apply(thisBinding, args);
// Mimic the constructor's `return` behavior.
// See https://es5.github.io/#x13.2.2 for more details.
return isObject(result) ? result : thisBinding;
};
}
/**
* Creates a function that wraps `func` to enable currying.
*
* @private
* @param {Function} func The function to wrap.
* @param {number} bitmask The bitmask flags. See `createWrap` for more details.
* @param {number} arity The arity of `func`.
* @returns {Function} Returns the new wrapped function.
*/
function createCurry(func, bitmask, arity) {
var Ctor = createCtor(func);
function wrapper() {
var length = arguments.length,
args = Array(length),
index = length,
placeholder = getHolder(wrapper);
while (index--) {
args[index] = arguments[index];
}
var holders = (length < 3 && args[0] !== placeholder && args[length - 1] !== placeholder)
? []
: replaceHolders(args, placeholder);
length -= holders.length;
if (length < arity) {
return createRecurry(
func, bitmask, createHybrid, wrapper.placeholder, undefined,
args, holders, undefined, undefined, arity - length);
}
var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
return apply(fn, this, args);
}
return wrapper;
}
/**
* Creates a `_.find` or `_.findLast` function.
*
* @private
* @param {Function} findIndexFunc The function to find the collection index.
* @returns {Function} Returns the new find function.
*/
function createFind(findIndexFunc) {
return function(collection, predicate, fromIndex) {
var iterable = Object(collection);
if (!isArrayLike(collection)) {
var iteratee = getIteratee(predicate, 3);
collection = keys(collection);
predicate = function(key) { return iteratee(iterable[key], key, iterable); };
}
var index = findIndexFunc(collection, predicate, fromIndex);
return index > -1 ? iterable[iteratee ? collection[index] : index] : undefined;
};
}
/**
* Creates a `_.flow` or `_.flowRight` function.
*
* @private
* @param {boolean} [fromRight] Specify iterating from right to left.
* @returns {Function} Returns the new flow function.
*/
function createFlow(fromRight) {
return flatRest(function(funcs) {
var length = funcs.length,
index = length,
prereq = LodashWrapper.prototype.thru;
if (fromRight) {
funcs.reverse();
}
while (index--) {
var func = funcs[index];
if (typeof func != 'function') {
throw new TypeError(FUNC_ERROR_TEXT);
}
if (prereq && !wrapper && getFuncName(func) == 'wrapper') {
var wrapper = new LodashWrapper([], true);
}
}
index = wrapper ? index : length;
while (++index < length) {
func = funcs[index];
var funcName = getFuncName(func),
data = funcName == 'wrapper' ? getData(func) : undefined;
if (data && isLaziable(data[0]) &&
data[1] == (ARY_FLAG | CURRY_FLAG | PARTIAL_FLAG | REARG_FLAG) &&
!data[4].length && data[9] == 1
) {
wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]);
} else {
wrapper = (func.length == 1 && isLaziable(func))
? wrapper[funcName]()
: wrapper.thru(func);
}
}
return function() {
var args = arguments,
value = args[0];
if (wrapper && args.length == 1 &&
isArray(value) && value.length >= LARGE_ARRAY_SIZE) {
return wrapper.plant(value).value();
}
var index = 0,
result = length ? funcs[index].apply(this, args) : value;
while (++index < length) {
result = funcs[index].call(this, result);
}
return result;
};
});
}
/**
* Creates a function that wraps `func` to invoke it with optional `this`
* binding of `thisArg`, partial application, and currying.
*
* @private
* @param {Function|string} func The function or method name to wrap.
* @param {number} bitmask The bitmask flags. See `createWrap` for more details.
* @param {*} [thisArg] The `this` binding of `func`.
* @param {Array} [partials] The arguments to prepend to those provided to
* the new function.
* @param {Array} [holders] The `partials` placeholder indexes.
* @param {Array} [partialsRight] The arguments to append to those provided
* to the new function.
* @param {Array} [holdersRight] The `partialsRight` placeholder indexes.
* @param {Array} [argPos] The argument positions of the new function.
* @param {number} [ary] The arity cap of `func`.
* @param {number} [arity] The arity of `func`.
* @returns {Function} Returns the new wrapped function.
*/
function createHybrid(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) {
var isAry = bitmask & ARY_FLAG,
isBind = bitmask & BIND_FLAG,
isBindKey = bitmask & BIND_KEY_FLAG,
isCurried = bitmask & (CURRY_FLAG | CURRY_RIGHT_FLAG),
isFlip = bitmask & FLIP_FLAG,
Ctor = isBindKey ? undefined : createCtor(func);
function wrapper() {
var length = arguments.length,
args = Array(length),
index = length;
while (index--) {
args[index] = arguments[index];
}
if (isCurried) {
var placeholder = getHolder(wrapper),
holdersCount = countHolders(args, placeholder);
}
if (partials) {
args = composeArgs(args, partials, holders, isCurried);
}
if (partialsRight) {
args = composeArgsRight(args, partialsRight, holdersRight, isCurried);
}
length -= holdersCount;
if (isCurried && length < arity) {
var newHolders = replaceHolders(args, placeholder);
return createRecurry(
func, bitmask, createHybrid, wrapper.placeholder, thisArg,
args, newHolders, argPos, ary, arity - length
);
}
var thisBinding = isBind ? thisArg : this,
fn = isBindKey ? thisBinding[func] : func;
length = args.length;
if (argPos) {
args = reorder(args, argPos);
} else if (isFlip && length > 1) {
args.reverse();
}
if (isAry && ary < length) {
args.length = ary;
}
if (this && this !== root && this instanceof wrapper) {
fn = Ctor || createCtor(fn);
}
return fn.apply(thisBinding, args);
}
return wrapper;
}
/**
* Creates a function like `_.invertBy`.
*
* @private
* @param {Function} setter The function to set accumulator values.
* @param {Function} toIteratee The function to resolve iteratees.
* @returns {Function} Returns the new inverter function.
*/
function createInverter(setter, toIteratee) {
return function(object, iteratee) {
return baseInverter(object, setter, toIteratee(iteratee), {});
};
}
/**
* Creates a function that performs a mathematical operation on two values.
*
* @private
* @param {Function} operator The function to perform the operation.
* @param {number} [defaultValue] The value used for `undefined` arguments.
* @returns {Function} Returns the new mathematical operation function.
*/
function createMathOperation(operator, defaultValue) {
return function(value, other) {
var result;
if (value === undefined && other === undefined) {
return defaultValue;
}
if (value !== undefined) {
result = value;
}
if (other !== undefined) {
if (result === undefined) {
return other;
}
if (typeof value == 'string' || typeof other == 'string') {
value = baseToString(value);
other = baseToString(other);
} else {
value = baseToNumber(value);
other = baseToNumber(other);
}
result = operator(value, other);
}
return result;
};
}
/**
* Creates a function like `_.over`.
*
* @private
* @param {Function} arrayFunc The function to iterate over iteratees.
* @returns {Function} Returns the new over function.
*/
function createOver(arrayFunc) {
return flatRest(function(iteratees) {
iteratees = arrayMap(iteratees, baseUnary(getIteratee()));
return baseRest(function(args) {
var thisArg = this;
return arrayFunc(iteratees, function(iteratee) {
return apply(iteratee, thisArg, args);
});
});
});
}
/**
* Creates the padding for `string` based on `length`. The `chars` string
* is truncated if the number of characters exceeds `length`.
*
* @private
* @param {number} length The padding length.
* @param {string} [chars=' '] The string used as padding.
* @returns {string} Returns the padding for `string`.
*/
function createPadding(length, chars) {
chars = chars === undefined ? ' ' : baseToString(chars);
var charsLength = chars.length;
if (charsLength < 2) {
return charsLength ? baseRepeat(chars, length) : chars;
}
var result = baseRepeat(chars, nativeCeil(length / stringSize(chars)));
return hasUnicode(chars)
? castSlice(stringToArray(result), 0, length).join('')
: result.slice(0, length);
}
/**
* Creates a function that wraps `func` to invoke it with the `this` binding
* of `thisArg` and `partials` prepended to the arguments it receives.
*
* @private
* @param {Function} func The function to wrap.
* @param {number} bitmask The bitmask flags. See `createWrap` for more details.
* @param {*} thisArg The `this` binding of `func`.
* @param {Array} partials The arguments to prepend to those provided to
* the new function.
* @returns {Function} Returns the new wrapped function.
*/
function createPartial(func, bitmask, thisArg, partials) {
var isBind = bitmask & BIND_FLAG,
Ctor = createCtor(func);
function wrapper() {
var argsIndex = -1,
argsLength = arguments.length,
leftIndex = -1,
leftLength = partials.length,
args = Array(leftLength + argsLength),
fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
while (++leftIndex < leftLength) {
args[leftIndex] = partials[leftIndex];
}
while (argsLength--) {
args[leftIndex++] = arguments[++argsIndex];
}
return apply(fn, isBind ? thisArg : this, args);
}
return wrapper;
}
/**
* Creates a `_.range` or `_.rangeRight` function.
*
* @private
* @param {boolean} [fromRight] Specify iterating from right to left.
* @returns {Function} Returns the new range function.
*/
function createRange(fromRight) {
return function(start, end, step) {
if (step && typeof step != 'number' && isIterateeCall(start, end, step)) {
end = step = undefined;
}
// Ensure the sign of `-0` is preserved.
start = toFinite(start);
if (end === undefined) {
end = start;
start = 0;
} else {
end = toFinite(end);
}
step = step === undefined ? (start < end ? 1 : -1) : toFinite(step);
return baseRange(start, end, step, fromRight);
};
}
/**
* Creates a function that performs a relational operation on two values.
*
* @private
* @param {Function} operator The function to perform the operation.
* @returns {Function} Returns the new relational operation function.
*/
function createRelationalOperation(operator) {
return function(value, other) {
if (!(typeof value == 'string' && typeof other == 'string')) {
value = toNumber(value);
other = toNumber(other);
}
return operator(value, other);
};
}
/**
* Creates a function that wraps `func` to continue currying.
*
* @private
* @param {Function} func The function to wrap.
* @param {number} bitmask The bitmask flags. See `createWrap` for more details.
* @param {Function} wrapFunc The function to create the `func` wrapper.
* @param {*} placeholder The placeholder value.
* @param {*} [thisArg] The `this` binding of `func`.
* @param {Array} [partials] The arguments to prepend to those provided to
* the new function.
* @param {Array} [holders] The `partials` placeholder indexes.
* @param {Array} [argPos] The argument positions of the new function.
* @param {number} [ary] The arity cap of `func`.
* @param {number} [arity] The arity of `func`.
* @returns {Function} Returns the new wrapped function.
*/
function createRecurry(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) {
var isCurry = bitmask & CURRY_FLAG,
newHolders = isCurry ? holders : undefined,
newHoldersRight = isCurry ? undefined : holders,
newPartials = isCurry ? partials : undefined,
newPartialsRight = isCurry ? undefined : partials;
bitmask |= (isCurry ? PARTIAL_FLAG : PARTIAL_RIGHT_FLAG);
bitmask &= ~(isCurry ? PARTIAL_RIGHT_FLAG : PARTIAL_FLAG);
if (!(bitmask & CURRY_BOUND_FLAG)) {
bitmask &= ~(BIND_FLAG | BIND_KEY_FLAG);
}
var newData = [
func, bitmask, thisArg, newPartials, newHolders, newPartialsRight,
newHoldersRight, argPos, ary, arity
];
var result = wrapFunc.apply(undefined, newData);
if (isLaziable(func)) {
setData(result, newData);
}
result.placeholder = placeholder;
return setWrapToString(result, func, bitmask);
}
/**
* Creates a function like `_.round`.
*
* @private
* @param {string} methodName The name of the `Math` method to use when rounding.
* @returns {Function} Returns the new round function.
*/
function createRound(methodName) {
var func = Math[methodName];
return function(number, precision) {
number = toNumber(number);
precision = nativeMin(toInteger(precision), 292);
if (precision) {
// Shift with exponential notation to avoid floating-point issues.
// See [MDN](https://mdn.io/round#Examples) for more details.
var pair = (toString(number) + 'e').split('e'),
value = func(pair[0] + 'e' + (+pair[1] + precision));
pair = (toString(value) + 'e').split('e');
return +(pair[0] + 'e' + (+pair[1] - precision));
}
return func(number);
};
}
/**
* Creates a set object of `values`.
*
* @private
* @param {Array} values The values to add to the set.
* @returns {Object} Returns the new set.
*/
var createSet = !(Set && (1 / setToArray(new Set([,-0]))[1]) == INFINITY) ? noop : function(values) {
return new Set(values);
};
/**
* Creates a `_.toPairs` or `_.toPairsIn` function.
*
* @private
* @param {Function} keysFunc The function to get the keys of a given object.
* @returns {Function} Returns the new pairs function.
*/
function createToPairs(keysFunc) {
return function(object) {
var tag = getTag(object);
if (tag == mapTag) {
return mapToArray(object);
}
if (tag == setTag) {
return setToPairs(object);
}
return baseToPairs(object, keysFunc(object));
};
}
/**
* Creates a function that either curries or invokes `func` with optional
* `this` binding and partially applied arguments.
*
* @private
* @param {Function|string} func The function or method name to wrap.
* @param {number} bitmask The bitmask flags.
* The bitmask may be composed of the following flags:
* 1 - `_.bind`
* 2 - `_.bindKey`
* 4 - `_.curry` or `_.curryRight` of a bound function
* 8 - `_.curry`
* 16 - `_.curryRight`
* 32 - `_.partial`
* 64 - `_.partialRight`
* 128 - `_.rearg`
* 256 - `_.ary`
* 512 - `_.flip`
* @param {*} [thisArg] The `this` binding of `func`.
* @param {Array} [partials] The arguments to be partially applied.
* @param {Array} [holders] The `partials` placeholder indexes.
* @param {Array} [argPos] The argument positions of the new function.
* @param {number} [ary] The arity cap of `func`.
* @param {number} [arity] The arity of `func`.
* @returns {Function} Returns the new wrapped function.
*/
function createWrap(func, bitmask, thisArg, partials, holders, argPos, ary, arity) {
var isBindKey = bitmask & BIND_KEY_FLAG;
if (!isBindKey && typeof func != 'function') {
throw new TypeError(FUNC_ERROR_TEXT);
}
var length = partials ? partials.length : 0;
if (!length) {
bitmask &= ~(PARTIAL_FLAG | PARTIAL_RIGHT_FLAG);
partials = holders = undefined;
}
ary = ary === undefined ? ary : nativeMax(toInteger(ary), 0);
arity = arity === undefined ? arity : toInteger(arity);
length -= holders ? holders.length : 0;
if (bitmask & PARTIAL_RIGHT_FLAG) {
var partialsRight = partials,
holdersRight = holders;
partials = holders = undefined;
}
var data = isBindKey ? undefined : getData(func);
var newData = [
func, bitmask, thisArg, partials, holders, partialsRight, holdersRight,
argPos, ary, arity
];
if (data) {
mergeData(newData, data);
}
func = newData[0];
bitmask = newData[1];
thisArg = newData[2];
partials = newData[3];
holders = newData[4];
arity = newData[9] = newData[9] == null
? (isBindKey ? 0 : func.length)
: nativeMax(newData[9] - length, 0);
if (!arity && bitmask & (CURRY_FLAG | CURRY_RIGHT_FLAG)) {
bitmask &= ~(CURRY_FLAG | CURRY_RIGHT_FLAG);
}
if (!bitmask || bitmask == BIND_FLAG) {
var result = createBind(func, bitmask, thisArg);
} else if (bitmask == CURRY_FLAG || bitmask == CURRY_RIGHT_FLAG) {
result = createCurry(func, bitmask, arity);
} else if ((bitmask == PARTIAL_FLAG || bitmask == (BIND_FLAG | PARTIAL_FLAG)) && !holders.length) {
result = createPartial(func, bitmask, thisArg, partials);
} else {
result = createHybrid.apply(undefined, newData);
}
var setter = data ? baseSetData : setData;
return setWrapToString(setter(result, newData), func, bitmask);
}
/**
* A specialized version of `baseIsEqualDeep` for arrays with support for
* partial deep comparisons.
*
* @private
* @param {Array} array The array to compare.
* @param {Array} other The other array to compare.
* @param {Function} equalFunc The function to determine equivalents of values.
* @param {Function} customizer The function to customize comparisons.
* @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
* for more details.
* @param {Object} stack Tracks traversed `array` and `other` objects.
* @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
*/
function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
arrLength = array.length,
othLength = other.length;
if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
return false;
}
// Assume cyclic values are equal.
var stacked = stack.get(array);
if (stacked && stack.get(other)) {
return stacked == other;
}
var index = -1,
result = true,
seen = (bitmask & UNORDERED_COMPARE_FLAG) ? new SetCache : undefined;
stack.set(array, other);
stack.set(other, array);
// Ignore non-index properties.
while (++index < arrLength) {
var arrValue = array[index],
othValue = other[index];
if (customizer) {
var compared = isPartial
? customizer(othValue, arrValue, index, other, array, stack)
: customizer(arrValue, othValue, index, array, other, stack);
}
if (compared !== undefined) {
if (compared) {
continue;
}
result = false;
break;
}
// Recursively compare arrays (susceptible to call stack limits).
if (seen) {
if (!arraySome(other, function(othValue, othIndex) {
if (!cacheHas(seen, othIndex) &&
(arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
return seen.push(othIndex);
}
})) {
result = false;
break;
}
} else if (!(
arrValue === othValue ||
equalFunc(arrValue, othValue, customizer, bitmask, stack)
)) {
result = false;
break;
}
}
stack['delete'](array);
stack['delete'](other);
return result;
}
/**
* A specialized version of `baseIsEqualDeep` for comparing objects of
* the same `toStringTag`.
*
* **Note:** This function only supports comparing values with tags of
* `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
*
* @private
* @param {Object} object The object to compare.
* @param {Object} other The other object to compare.
* @param {string} tag The `toStringTag` of the objects to compare.
* @param {Function} equalFunc The function to determine equivalents of values.
* @param {Function} customizer The function to customize comparisons.
* @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
* for more details.
* @param {Object} stack Tracks traversed `object` and `other` objects.
* @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
*/
function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
switch (tag) {
case dataViewTag:
if ((object.byteLength != other.byteLength) ||
(object.byteOffset != other.byteOffset)) {
return false;
}
object = object.buffer;
other = other.buffer;
case arrayBufferTag:
if ((object.byteLength != other.byteLength) ||
!equalFunc(new Uint8Array(object), new Uint8Array(other))) {
return false;
}
return true;
case boolTag:
case dateTag:
case numberTag:
// Coerce booleans to `1` or `0` and dates to milliseconds.
// Invalid dates are coerced to `NaN`.
return eq(+object, +other);
case errorTag:
return object.name == other.name && object.message == other.message;
case regexpTag:
case stringTag:
// Coerce regexes to strings and treat strings, primitives and objects,
// as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring
// for more details.
return object == (other + '');
case mapTag:
var convert = mapToArray;
case setTag:
var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
convert || (convert = setToArray);
if (object.size != other.size && !isPartial) {
return false;
}
// Assume cyclic values are equal.
var stacked = stack.get(object);
if (stacked) {
return stacked == other;
}
bitmask |= UNORDERED_COMPARE_FLAG;
// Recursively compare objects (susceptible to call stack limits).
stack.set(object, other);
var result = equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);
stack['delete'](object);
return result;
case symbolTag:
if (symbolValueOf) {
return symbolValueOf.call(object) == symbolValueOf.call(other);
}
}
return false;
}
/**
* A specialized version of `baseIsEqualDeep` for objects with support for
* partial deep comparisons.
*
* @private
* @param {Object} object The object to compare.
* @param {Object} other The other object to compare.
* @param {Function} equalFunc The function to determine equivalents of values.
* @param {Function} customizer The function to customize comparisons.
* @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
* for more details.
* @param {Object} stack Tracks traversed `object` and `other` objects.
* @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
*/
function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
objProps = keys(object),
objLength = objProps.length,
othProps = keys(other),
othLength = othProps.length;
if (objLength != othLength && !isPartial) {
return false;
}
var index = objLength;
while (index--) {
var key = objProps[index];
if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {
return false;
}
}
// Assume cyclic values are equal.
var stacked = stack.get(object);
if (stacked && stack.get(other)) {
return stacked == other;
}
var result = true;
stack.set(object, other);
stack.set(other, object);
var skipCtor = isPartial;
while (++index < objLength) {
key = objProps[index];
var objValue = object[key],
othValue = other[key];
if (customizer) {
var compared = isPartial
? customizer(othValue, objValue, key, other, object, stack)
: customizer(objValue, othValue, key, object, other, stack);
}
// Recursively compare objects (susceptible to call stack limits).
if (!(compared === undefined
? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
: compared
)) {
result = false;
break;
}
skipCtor || (skipCtor = key == 'constructor');
}
if (result && !skipCtor) {
var objCtor = object.constructor,
othCtor = other.constructor;
// Non `Object` object instances with different constructors are not equal.
if (objCtor != othCtor &&
('constructor' in object && 'constructor' in other) &&
!(typeof objCtor == 'function' && objCtor instanceof objCtor &&
typeof othCtor == 'function' && othCtor instanceof othCtor)) {
result = false;
}
}
stack['delete'](object);
stack['delete'](other);
return result;
}
/**
* A specialized version of `baseRest` which flattens the rest array.
*
* @private
* @param {Function} func The function to apply a rest parameter to.
* @returns {Function} Returns the new function.
*/
function flatRest(func) {
return setToString(overRest(func, undefined, flatten), func + '');
}
/**
* Creates an array of own enumerable property names and symbols of `object`.
*
* @private
* @param {Object} object The object to query.
* @returns {Array} Returns the array of property names and symbols.
*/
function getAllKeys(object) {
return baseGetAllKeys(object, keys, getSymbols);
}
/**
* Creates an array of own and inherited enumerable property names and
* symbols of `object`.
*
* @private
* @param {Object} object The object to query.
* @returns {Array} Returns the array of property names and symbols.
*/
function getAllKeysIn(object) {
return baseGetAllKeys(object, keysIn, getSymbolsIn);
}
/**
* Gets metadata for `func`.
*
* @private
* @param {Function} func The function to query.
* @returns {*} Returns the metadata for `func`.
*/
var getData = !metaMap ? noop : function(func) {
return metaMap.get(func);
};
/**
* Gets the name of `func`.
*
* @private
* @param {Function} func The function to query.
* @returns {string} Returns the function name.
*/
function getFuncName(func) {
var result = (func.name + ''),
array = realNames[result],
length = hasOwnProperty.call(realNames, result) ? array.length : 0;
while (length--) {
var data = array[length],
otherFunc = data.func;
if (otherFunc == null || otherFunc == func) {
return data.name;
}
}
return result;
}
/**
* Gets the argument placeholder value for `func`.
*
* @private
* @param {Function} func The function to inspect.
* @returns {*} Returns the placeholder value.
*/
function getHolder(func) {
var object = hasOwnProperty.call(lodash, 'placeholder') ? lodash : func;
return object.placeholder;
}
/**
* Gets the appropriate "iteratee" function. If `_.iteratee` is customized,
* this function returns the custom method, otherwise it returns `baseIteratee`.
* If arguments are provided, the chosen function is invoked with them and
* its result is returned.
*
* @private
* @param {*} [value] The value to convert to an iteratee.
* @param {number} [arity] The arity of the created iteratee.
* @returns {Function} Returns the chosen function or its result.
*/
function getIteratee() {
var result = lodash.iteratee || iteratee;
result = result === iteratee ? baseIteratee : result;
return arguments.length ? result(arguments[0], arguments[1]) : result;
}
/**
* Gets the data for `map`.
*
* @private
* @param {Object} map The map to query.
* @param {string} key The reference key.
* @returns {*} Returns the map data.
*/
function getMapData(map, key) {
var data = map.__data__;
return isKeyable(key)
? data[typeof key == 'string' ? 'string' : 'hash']
: data.map;
}
/**
* Gets the property names, values, and compare flags of `object`.
*
* @private
* @param {Object} object The object to query.
* @returns {Array} Returns the match data of `object`.
*/
function getMatchData(object) {
var result = keys(object),
length = result.length;
while (length--) {
var key = result[length],
value = object[key];
result[length] = [key, value, isStrictComparable(value)];
}
return result;
}
/**
* Gets the native function at `key` of `object`.
*
* @private
* @param {Object} object The object to query.
* @param {string} key The key of the method to get.
* @returns {*} Returns the function if it's native, else `undefined`.
*/
function getNative(object, key) {
var value = getValue(object, key);
return baseIsNative(value) ? value : undefined;
}
/**
* A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
*
* @private
* @param {*} value The value to query.
* @returns {string} Returns the raw `toStringTag`.
*/
function getRawTag(value) {
var isOwn = hasOwnProperty.call(value, symToStringTag),
tag = value[symToStringTag];
try {
value[symToStringTag] = undefined;
var unmasked = true;
} catch (e) {}
var result = nativeObjectToString.call(value);
if (unmasked) {
if (isOwn) {
value[symToStringTag] = tag;
} else {
delete value[symToStringTag];
}
}
return result;
}
/**
* Creates an array of the own enumerable symbol properties of `object`.
*
* @private
* @param {Object} object The object to query.
* @returns {Array} Returns the array of symbols.
*/
var getSymbols = nativeGetSymbols ? overArg(nativeGetSymbols, Object) : stubArray;
/**
* Creates an array of the own and inherited enumerable symbol properties
* of `object`.
*
* @private
* @param {Object} object The object to query.
* @returns {Array} Returns the array of symbols.
*/
var getSymbolsIn = !nativeGetSymbols ? stubArray : function(object) {
var result = [];
while (object) {
arrayPush(result, getSymbols(object));
object = getPrototype(object);
}
return result;
};
/**
* Gets the `toStringTag` of `value`.
*
* @private
* @param {*} value The value to query.
* @returns {string} Returns the `toStringTag`.
*/
var getTag = baseGetTag;
// Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.
if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
(Map && getTag(new Map) != mapTag) ||
(Promise && getTag(Promise.resolve()) != promiseTag) ||
(Set && getTag(new Set) != setTag) ||
(WeakMap && getTag(new WeakMap) != weakMapTag)) {
getTag = function(value) {
var result = baseGetTag(value),
Ctor = result == objectTag ? value.constructor : undefined,
ctorString = Ctor ? toSource(Ctor) : '';
if (ctorString) {
switch (ctorString) {
case dataViewCtorString: return dataViewTag;
case mapCtorString: return mapTag;
case promiseCtorString: return promiseTag;
case setCtorString: return setTag;
case weakMapCtorString: return weakMapTag;
}
}
return result;
};
}
/**
* Gets the view, applying any `transforms` to the `start` and `end` positions.
*
* @private
* @param {number} start The start of the view.
* @param {number} end The end of the view.
* @param {Array} transforms The transformations to apply to the view.
* @returns {Object} Returns an object containing the `start` and `end`
* positions of the view.
*/
function getView(start, end, transforms) {
var index = -1,
length = transforms.length;
while (++index < length) {
var data = transforms[index],
size = data.size;
switch (data.type) {
case 'drop': start += size; break;
case 'dropRight': end -= size; break;
case 'take': end = nativeMin(end, start + size); break;
case 'takeRight': start = nativeMax(start, end - size); break;
}
}
return { 'start': start, 'end': end };
}
/**
* Extracts wrapper details from the `source` body comment.
*
* @private
* @param {string} source The source to inspect.
* @returns {Array} Returns the wrapper details.
*/
function getWrapDetails(source) {
var match = source.match(reWrapDetails);
return match ? match[1].split(reSplitDetails) : [];
}
/**
* Checks if `path` exists on `object`.
*
* @private
* @param {Object} object The object to query.
* @param {Array|string} path The path to check.
* @param {Function} hasFunc The function to check properties.
* @returns {boolean} Returns `true` if `path` exists, else `false`.
*/
function hasPath(object, path, hasFunc) {
path = isKey(path, object) ? [path] : castPath(path);
var index = -1,
length = path.length,
result = false;
while (++index < length) {
var key = toKey(path[index]);
if (!(result = object != null && hasFunc(object, key))) {
break;
}
object = object[key];
}
if (result || ++index != length) {
return result;
}
length = object == null ? 0 : object.length;
return !!length && isLength(length) && isIndex(key, length) &&
(isArray(object) || isArguments(object));
}
/**
* Initializes an array clone.
*
* @private
* @param {Array} array The array to clone.
* @returns {Array} Returns the initialized clone.
*/
function initCloneArray(array) {
var length = array.length,
result = array.constructor(length);
// Add properties assigned by `RegExp#exec`.
if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
result.index = array.index;
result.input = array.input;
}
return result;
}
/**
* Initializes an object clone.
*
* @private
* @param {Object} object The object to clone.
* @returns {Object} Returns the initialized clone.
*/
function initCloneObject(object) {
return (typeof object.constructor == 'function' && !isPrototype(object))
? baseCreate(getPrototype(object))
: {};
}
/**
* Initializes an object clone based on its `toStringTag`.
*
* **Note:** This function only supports cloning values with tags of
* `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
*
* @private
* @param {Object} object The object to clone.
* @param {string} tag The `toStringTag` of the object to clone.
* @param {Function} cloneFunc The function to clone values.
* @param {boolean} [isDeep] Specify a deep clone.
* @returns {Object} Returns the initialized clone.
*/
function initCloneByTag(object, tag, cloneFunc, isDeep) {
var Ctor = object.constructor;
switch (tag) {
case arrayBufferTag:
return cloneArrayBuffer(object);
case boolTag:
case dateTag:
return new Ctor(+object);
case dataViewTag:
return cloneDataView(object, isDeep);
case float32Tag: case float64Tag:
case int8Tag: case int16Tag: case int32Tag:
case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:
return cloneTypedArray(object, isDeep);
case mapTag:
return cloneMap(object, isDeep, cloneFunc);
case numberTag:
case stringTag:
return new Ctor(object);
case regexpTag:
return cloneRegExp(object);
case setTag:
return cloneSet(object, isDeep, cloneFunc);
case symbolTag:
return cloneSymbol(object);
}
}
/**
* Inserts wrapper `details` in a comment at the top of the `source` body.
*
* @private
* @param {string} source The source to modify.
* @returns {Array} details The details to insert.
* @returns {string} Returns the modified source.
*/
function insertWrapDetails(source, details) {
var length = details.length;
if (!length) {
return source;
}
var lastIndex = length - 1;
details[lastIndex] = (length > 1 ? '& ' : '') + details[lastIndex];
details = details.join(length > 2 ? ', ' : ' ');
return source.replace(reWrapComment, '{\n/* [wrapped with ' + details + '] */\n');
}
/**
* Checks if `value` is a flattenable `arguments` object or array.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
*/
function isFlattenable(value) {
return isArray(value) || isArguments(value) ||
!!(spreadableSymbol && value && value[spreadableSymbol]);
}
/**
* Checks if `value` is a valid array-like index.
*
* @private
* @param {*} value The value to check.
* @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
* @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
*/
function isIndex(value, length) {
length = length == null ? MAX_SAFE_INTEGER : length;
return !!length &&
(typeof value == 'number' || reIsUint.test(value)) &&
(value > -1 && value % 1 == 0 && value < length);
}
/**
* Checks if the given arguments are from an iteratee call.
*
* @private
* @param {*} value The potential iteratee value argument.
* @param {*} index The potential iteratee index or key argument.
* @param {*} object The potential iteratee object argument.
* @returns {boolean} Returns `true` if the arguments are from an iteratee call,
* else `false`.
*/
function isIterateeCall(value, index, object) {
if (!isObject(object)) {
return false;
}
var type = typeof index;
if (type == 'number'
? (isArrayLike(object) && isIndex(index, object.length))
: (type == 'string' && index in object)
) {
return eq(object[index], value);
}
return false;
}
/**
* Checks if `value` is a property name and not a property path.
*
* @private
* @param {*} value The value to check.
* @param {Object} [object] The object to query keys on.
* @returns {boolean} Returns `true` if `value` is a property name, else `false`.
*/
function isKey(value, object) {
if (isArray(value)) {
return false;
}
var type = typeof value;
if (type == 'number' || type == 'symbol' || type == 'boolean' ||
value == null || isSymbol(value)) {
return true;
}
return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
(object != null && value in Object(object));
}
/**
* Checks if `value` is suitable for use as unique object key.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is suitable, else `false`.
*/
function isKeyable(value) {
var type = typeof value;
return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
? (value !== '__proto__')
: (value === null);
}
/**
* Checks if `func` has a lazy counterpart.
*
* @private
* @param {Function} func The function to check.
* @returns {boolean} Returns `true` if `func` has a lazy counterpart,
* else `false`.
*/
function isLaziable(func) {
var funcName = getFuncName(func),
other = lodash[funcName];
if (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) {
return false;
}
if (func === other) {
return true;
}
var data = getData(other);
return !!data && func === data[0];
}
/**
* Checks if `func` has its source masked.
*
* @private
* @param {Function} func The function to check.
* @returns {boolean} Returns `true` if `func` is masked, else `false`.
*/
function isMasked(func) {
return !!maskSrcKey && (maskSrcKey in func);
}
/**
* Checks if `func` is capable of being masked.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `func` is maskable, else `false`.
*/
var isMaskable = coreJsData ? isFunction : stubFalse;
/**
* Checks if `value` is likely a prototype object.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
*/
function isPrototype(value) {
var Ctor = value && value.constructor,
proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
return value === proto;
}
/**
* Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` if suitable for strict
* equality comparisons, else `false`.
*/
function isStrictComparable(value) {
return value === value && !isObject(value);
}
/**
* A specialized version of `matchesProperty` for source values suitable
* for strict equality comparisons, i.e. `===`.
*
* @private
* @param {string} key The key of the property to get.
* @param {*} srcValue The value to match.
* @returns {Function} Returns the new spec function.
*/
function matchesStrictComparable(key, srcValue) {
return function(object) {
if (object == null) {
return false;
}
return object[key] === srcValue &&
(srcValue !== undefined || (key in Object(object)));
};
}
/**
* A specialized version of `_.memoize` which clears the memoized function's
* cache when it exceeds `MAX_MEMOIZE_SIZE`.
*
* @private
* @param {Function} func The function to have its output memoized.
* @returns {Function} Returns the new memoized function.
*/
function memoizeCapped(func) {
var result = memoize(func, function(key) {
if (cache.size === MAX_MEMOIZE_SIZE) {
cache.clear();
}
return key;
});
var cache = result.cache;
return result;
}
/**
* Merges the function metadata of `source` into `data`.
*
* Merging metadata reduces the number of wrappers used to invoke a function.
* This is possible because methods like `_.bind`, `_.curry`, and `_.partial`
* may be applied regardless of execution order. Methods like `_.ary` and
* `_.rearg` modify function arguments, making the order in which they are
* executed important, preventing the merging of metadata. However, we make
* an exception for a safe combined case where curried functions have `_.ary`
* and or `_.rearg` applied.
*
* @private
* @param {Array} data The destination metadata.
* @param {Array} source The source metadata.
* @returns {Array} Returns `data`.
*/
function mergeData(data, source) {
var bitmask = data[1],
srcBitmask = source[1],
newBitmask = bitmask | srcBitmask,
isCommon = newBitmask < (BIND_FLAG | BIND_KEY_FLAG | ARY_FLAG);
var isCombo =
((srcBitmask == ARY_FLAG) && (bitmask == CURRY_FLAG)) ||
((srcBitmask == ARY_FLAG) && (bitmask == REARG_FLAG) && (data[7].length <= source[8])) ||
((srcBitmask == (ARY_FLAG | REARG_FLAG)) && (source[7].length <= source[8]) && (bitmask == CURRY_FLAG));
// Exit early if metadata can't be merged.
if (!(isCommon || isCombo)) {
return data;
}
// Use source `thisArg` if available.
if (srcBitmask & BIND_FLAG) {
data[2] = source[2];
// Set when currying a bound function.
newBitmask |= bitmask & BIND_FLAG ? 0 : CURRY_BOUND_FLAG;
}
// Compose partial arguments.
var value = source[3];
if (value) {
var partials = data[3];
data[3] = partials ? composeArgs(partials, value, source[4]) : value;
data[4] = partials ? replaceHolders(data[3], PLACEHOLDER) : source[4];
}
// Compose partial right arguments.
value = source[5];
if (value) {
partials = data[5];
data[5] = partials ? composeArgsRight(partials, value, source[6]) : value;
data[6] = partials ? replaceHolders(data[5], PLACEHOLDER) : source[6];
}
// Use source `argPos` if available.
value = source[7];
if (value) {
data[7] = value;
}
// Use source `ary` if it's smaller.
if (srcBitmask & ARY_FLAG) {
data[8] = data[8] == null ? source[8] : nativeMin(data[8], source[8]);
}
// Use source `arity` if one is not provided.
if (data[9] == null) {
data[9] = source[9];
}
// Use source `func` and merge bitmasks.
data[0] = source[0];
data[1] = newBitmask;
return data;
}
/**
* Used by `_.defaultsDeep` to customize its `_.merge` use.
*
* @private
* @param {*} objValue The destination value.
* @param {*} srcValue The source value.
* @param {string} key The key of the property to merge.
* @param {Object} object The parent object of `objValue`.
* @param {Object} source The parent object of `srcValue`.
* @param {Object} [stack] Tracks traversed source values and their merged
* counterparts.
* @returns {*} Returns the value to assign.
*/
function mergeDefaults(objValue, srcValue, key, object, source, stack) {
if (isObject(objValue) && isObject(srcValue)) {
// Recursively merge objects and arrays (susceptible to call stack limits).
stack.set(srcValue, objValue);
baseMerge(objValue, srcValue, undefined, mergeDefaults, stack);
stack['delete'](srcValue);
}
return objValue;
}
/**
* This function is like
* [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
* except that it includes inherited enumerable properties.
*
* @private
* @param {Object} object The object to query.
* @returns {Array} Returns the array of property names.
*/
function nativeKeysIn(object) {
var result = [];
if (object != null) {
for (var key in Object(object)) {
result.push(key);
}
}
return result;
}
/**
* Converts `value` to a string using `Object.prototype.toString`.
*
* @private
* @param {*} value The value to convert.
* @returns {string} Returns the converted string.
*/
function objectToString(value) {
return nativeObjectToString.call(value);
}
/**
* A specialized version of `baseRest` which transforms the rest array.
*
* @private
* @param {Function} func The function to apply a rest parameter to.
* @param {number} [start=func.length-1] The start position of the rest parameter.
* @param {Function} transform The rest array transform.
* @returns {Function} Returns the new function.
*/
function overRest(func, start, transform) {
start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
return function() {
var args = arguments,
index = -1,
length = nativeMax(args.length - start, 0),
array = Array(length);
while (++index < length) {
array[index] = args[start + index];
}
index = -1;
var otherArgs = Array(start + 1);
while (++index < start) {
otherArgs[index] = args[index];
}
otherArgs[start] = transform(array);
return apply(func, this, otherArgs);
};
}
/**
* Gets the parent value at `path` of `object`.
*
* @private
* @param {Object} object The object to query.
* @param {Array} path The path to get the parent value of.
* @returns {*} Returns the parent value.
*/
function parent(object, path) {
return path.length == 1 ? object : baseGet(object, baseSlice(path, 0, -1));
}
/**
* Reorder `array` according to the specified indexes where the element at
* the first index is assigned as the first element, the element at
* the second index is assigned as the second element, and so on.
*
* @private
* @param {Array} array The array to reorder.
* @param {Array} indexes The arranged array indexes.
* @returns {Array} Returns `array`.
*/
function reorder(array, indexes) {
var arrLength = array.length,
length = nativeMin(indexes.length, arrLength),
oldArray = copyArray(array);
while (length--) {
var index = indexes[length];
array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined;
}
return array;
}
/**
* Sets metadata for `func`.
*
* **Note:** If this function becomes hot, i.e. is invoked a lot in a short
* period of time, it will trip its breaker and transition to an identity
* function to avoid garbage collection pauses in V8. See
* [V8 issue 2070](https://bugs.chromium.org/p/v8/issues/detail?id=2070)
* for more details.
*
* @private
* @param {Function} func The function to associate metadata with.
* @param {*} data The metadata.
* @returns {Function} Returns `func`.
*/
var setData = shortOut(baseSetData);
/**
* A simple wrapper around the global [`setTimeout`](https://mdn.io/setTimeout).
*
* @private
* @param {Function} func The function to delay.
* @param {number} wait The number of milliseconds to delay invocation.
* @returns {number|Object} Returns the timer id or timeout object.
*/
var setTimeout = ctxSetTimeout || function(func, wait) {
return root.setTimeout(func, wait);
};
/**
* Sets the `toString` method of `func` to return `string`.
*
* @private
* @param {Function} func The function to modify.
* @param {Function} string The `toString` result.
* @returns {Function} Returns `func`.
*/
var setToString = shortOut(baseSetToString);
/**
* Sets the `toString` method of `wrapper` to mimic the source of `reference`
* with wrapper details in a comment at the top of the source body.
*
* @private
* @param {Function} wrapper The function to modify.
* @param {Function} reference The reference function.
* @param {number} bitmask The bitmask flags. See `createWrap` for more details.
* @returns {Function} Returns `wrapper`.
*/
function setWrapToString(wrapper, reference, bitmask) {
var source = (reference + '');
return setToString(wrapper, insertWrapDetails(source, updateWrapDetails(getWrapDetails(source), bitmask)));
}
/**
* Creates a function that'll short out and invoke `identity` instead
* of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN`
* milliseconds.
*
* @private
* @param {Function} func The function to restrict.
* @returns {Function} Returns the new shortable function.
*/
function shortOut(func) {
var count = 0,
lastCalled = 0;
return function() {
var stamp = nativeNow(),
remaining = HOT_SPAN - (stamp - lastCalled);
lastCalled = stamp;
if (remaining > 0) {
if (++count >= HOT_COUNT) {
return arguments[0];
}
} else {
count = 0;
}
return func.apply(undefined, arguments);
};
}
/**
* A specialized version of `_.shuffle` which mutates and sets the size of `array`.
*
* @private
* @param {Array} array The array to shuffle.
* @param {number} [size=array.length] The size of `array`.
* @returns {Array} Returns `array`.
*/
function shuffleSelf(array, size) {
var index = -1,
length = array.length,
lastIndex = length - 1;
size = size === undefined ? length : size;
while (++index < size) {
var rand = baseRandom(index, lastIndex),
value = array[rand];
array[rand] = array[index];
array[index] = value;
}
array.length = size;
return array;
}
/**
* Converts `string` to a property path array.
*
* @private
* @param {string} string The string to convert.
* @returns {Array} Returns the property path array.
*/
var stringToPath = memoizeCapped(function(string) {
string = toString(string);
var result = [];
if (reLeadingDot.test(string)) {
result.push('');
}
string.replace(rePropName, function(match, number, quote, string) {
result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
});
return result;
});
/**
* Converts `value` to a string key if it's not a string or symbol.
*
* @private
* @param {*} value The value to inspect.
* @returns {string|symbol} Returns the key.
*/
function toKey(value) {
if (typeof value == 'string' || isSymbol(value)) {
return value;
}
var result = (value + '');
return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
}
/**
* Converts `func` to its source code.
*
* @private
* @param {Function} func The function to convert.
* @returns {string} Returns the source code.
*/
function toSource(func) {
if (func != null) {
try {
return funcToString.call(func);
} catch (e) {}
try {
return (func + '');
} catch (e) {}
}
return '';
}
/**
* Updates wrapper `details` based on `bitmask` flags.
*
* @private
* @returns {Array} details The details to modify.
* @param {number} bitmask The bitmask flags. See `createWrap` for more details.
* @returns {Array} Returns `details`.
*/
function updateWrapDetails(details, bitmask) {
arrayEach(wrapFlags, function(pair) {
var value = '_.' + pair[0];
if ((bitmask & pair[1]) && !arrayIncludes(details, value)) {
details.push(value);
}
});
return details.sort();
}
/**
* Creates a clone of `wrapper`.
*
* @private
* @param {Object} wrapper The wrapper to clone.
* @returns {Object} Returns the cloned wrapper.
*/
function wrapperClone(wrapper) {
if (wrapper instanceof LazyWrapper) {
return wrapper.clone();
}
var result = new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__);
result.__actions__ = copyArray(wrapper.__actions__);
result.__index__ = wrapper.__index__;
result.__values__ = wrapper.__values__;
return result;
}
/*------------------------------------------------------------------------*/
/**
* Creates an array of elements split into groups the length of `size`.
* If `array` can't be split evenly, the final chunk will be the remaining
* elements.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Array
* @param {Array} array The array to process.
* @param {number} [size=1] The length of each chunk
* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
* @returns {Array} Returns the new array of chunks.
* @example
*
* _.chunk(['a', 'b', 'c', 'd'], 2);
* // => [['a', 'b'], ['c', 'd']]
*
* _.chunk(['a', 'b', 'c', 'd'], 3);
* // => [['a', 'b', 'c'], ['d']]
*/
function chunk(array, size, guard) {
if ((guard ? isIterateeCall(array, size, guard) : size === undefined)) {
size = 1;
} else {
size = nativeMax(toInteger(size), 0);
}
var length = array == null ? 0 : array.length;
if (!length || size < 1) {
return [];
}
var index = 0,
resIndex = 0,
result = Array(nativeCeil(length / size));
while (index < length) {
result[resIndex++] = baseSlice(array, index, (index += size));
}
return result;
}
/**
* Creates an array with all falsey values removed. The values `false`, `null`,
* `0`, `""`, `undefined`, and `NaN` are falsey.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Array
* @param {Array} array The array to compact.
* @returns {Array} Returns the new array of filtered values.
* @example
*
* _.compact([0, 1, false, 2, '', 3]);
* // => [1, 2, 3]
*/
function compact(array) {
var index = -1,
length = array == null ? 0 : array.length,
resIndex = 0,
result = [];
while (++index < length) {
var value = array[index];
if (value) {
result[resIndex++] = value;
}
}
return result;
}
/**
* Creates a new array concatenating `array` with any additional arrays
* and/or values.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Array
* @param {Array} array The array to concatenate.
* @param {...*} [values] The values to concatenate.
* @returns {Array} Returns the new concatenated array.
* @example
*
* var array = [1];
* var other = _.concat(array, 2, [3], [[4]]);
*
* console.log(other);
* // => [1, 2, 3, [4]]
*
* console.log(array);
* // => [1]
*/
function concat() {
var length = arguments.length;
if (!length) {
return [];
}
var args = Array(length - 1),
array = arguments[0],
index = length;
while (index--) {
args[index - 1] = arguments[index];
}
return arrayPush(isArray(array) ? copyArray(array) : [array], baseFlatten(args, 1));
}
/**
* Creates an array of `array` values not included in the other given arrays
* using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
* for equality comparisons. The order and references of result values are
* determined by the first array.
*
* **Note:** Unlike `_.pullAll`, this method returns a new array.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Array
* @param {Array} array The array to inspect.
* @param {...Array} [values] The values to exclude.
* @returns {Array} Returns the new array of filtered values.
* @see _.without, _.xor
* @example
*
* _.difference([2, 1], [2, 3]);
* // => [1]
*/
var difference = baseRest(function(array, values) {
return isArrayLikeObject(array)
? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true))
: [];
});
/**
* This method is like `_.difference` except that it accepts `iteratee` which
* is invoked for each element of `array` and `values` to generate the criterion
* by which they're compared. The order and references of result values are
* determined by the first array. The iteratee is invoked with one argument:
* (value).
*
* **Note:** Unlike `_.pullAllBy`, this method returns a new array.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Array
* @param {Array} array The array to inspect.
* @param {...Array} [values] The values to exclude.
* @param {Function} [iteratee=_.identity] The iteratee invoked per element.
* @returns {Array} Returns the new array of filtered values.
* @example
*
* _.differenceBy([2.1, 1.2], [2.3, 3.4], Math.floor);
* // => [1.2]
*
* // The `_.property` iteratee shorthand.
* _.differenceBy([{ 'x': 2 }, { 'x': 1 }], [{ 'x': 1 }], 'x');
* // => [{ 'x': 2 }]
*/
var differenceBy = baseRest(function(array, values) {
var iteratee = last(values);
if (isArrayLikeObject(iteratee)) {
iteratee = undefined;
}
return isArrayLikeObject(array)
? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), getIteratee(iteratee, 2))
: [];
});
/**
* This method is like `_.difference` except that it accepts `comparator`
* which is invoked to compare elements of `array` to `values`. The order and
* references of result values are determined by the first array. The comparator
* is invoked with two arguments: (arrVal, othVal).
*
* **Note:** Unlike `_.pullAllWith`, this method returns a new array.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Array
* @param {Array} array The array to inspect.
* @param {...Array} [values] The values to exclude.
* @param {Function} [comparator] The comparator invoked per element.
* @returns {Array} Returns the new array of filtered values.
* @example
*
* var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
*
* _.differenceWith(objects, [{ 'x': 1, 'y': 2 }], _.isEqual);
* // => [{ 'x': 2, 'y': 1 }]
*/
var differenceWith = baseRest(function(array, values) {
var comparator = last(values);
if (isArrayLikeObject(comparator)) {
comparator = undefined;
}
return isArrayLikeObject(array)
? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), undefined, comparator)
: [];
});
/**
* Creates a slice of `array` with `n` elements dropped from the beginning.
*
* @static
* @memberOf _
* @since 0.5.0
* @category Array
* @param {Array} array The array to query.
* @param {number} [n=1] The number of elements to drop.
* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
* @returns {Array} Returns the slice of `array`.
* @example
*
* _.drop([1, 2, 3]);
* // => [2, 3]
*
* _.drop([1, 2, 3], 2);
* // => [3]
*
* _.drop([1, 2, 3], 5);
* // => []
*
* _.drop([1, 2, 3], 0);
* // => [1, 2, 3]
*/
function drop(array, n, guard) {
var length = array == null ? 0 : array.length;
if (!length) {
return [];
}
n = (guard || n === undefined) ? 1 : toInteger(n);
return baseSlice(array, n < 0 ? 0 : n, length);
}
/**
* Creates a slice of `array` with `n` elements dropped from the end.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Array
* @param {Array} array The array to query.
* @param {number} [n=1] The number of elements to drop.
* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
* @returns {Array} Returns the slice of `array`.
* @example
*
* _.dropRight([1, 2, 3]);
* // => [1, 2]
*
* _.dropRight([1, 2, 3], 2);
* // => [1]
*
* _.dropRight([1, 2, 3], 5);
* // => []
*
* _.dropRight([1, 2, 3], 0);
* // => [1, 2, 3]
*/
function dropRight(array, n, guard) {
var length = array == null ? 0 : array.length;
if (!length) {
return [];
}
n = (guard || n === undefined) ? 1 : toInteger(n);
n = length - n;
return baseSlice(array, 0, n < 0 ? 0 : n);
}
/**
* Creates a slice of `array` excluding elements dropped from the end.
* Elements are dropped until `predicate` returns falsey. The predicate is
* invoked with three arguments: (value, index, array).
*
* @static
* @memberOf _
* @since 3.0.0
* @category Array
* @param {Array} array The array to query.
* @param {Function} [predicate=_.identity] The function invoked per iteration.
* @returns {Array} Returns the slice of `array`.
* @example
*
* var users = [
* { 'user': 'barney', 'active': true },
* { 'user': 'fred', 'active': false },
* { 'user': 'pebbles', 'active': false }
* ];
*
* _.dropRightWhile(users, function(o) { return !o.active; });
* // => objects for ['barney']
*
* // The `_.matches` iteratee shorthand.
* _.dropRightWhile(users, { 'user': 'pebbles', 'active': false });
* // => objects for ['barney', 'fred']
*
* // The `_.matchesProperty` iteratee shorthand.
* _.dropRightWhile(users, ['active', false]);
* // => objects for ['barney']
*
* // The `_.property` iteratee shorthand.
* _.dropRightWhile(users, 'active');
* // => objects for ['barney', 'fred', 'pebbles']
*/
function dropRightWhile(array, predicate) {
return (array && array.length)
? baseWhile(array, getIteratee(predicate, 3), true, true)
: [];
}
/**
* Creates a slice of `array` excluding elements dropped from the beginning.
* Elements are dropped until `predicate` returns falsey. The predicate is
* invoked with three arguments: (value, index, array).
*
* @static
* @memberOf _
* @since 3.0.0
* @category Array
* @param {Array} array The array to query.
* @param {Function} [predicate=_.identity] The function invoked per iteration.
* @returns {Array} Returns the slice of `array`.
* @example
*
* var users = [
* { 'user': 'barney', 'active': false },
* { 'user': 'fred', 'active': false },
* { 'user': 'pebbles', 'active': true }
* ];
*
* _.dropWhile(users, function(o) { return !o.active; });
* // => objects for ['pebbles']
*
* // The `_.matches` iteratee shorthand.
* _.dropWhile(users, { 'user': 'barney', 'active': false });
* // => objects for ['fred', 'pebbles']
*
* // The `_.matchesProperty` iteratee shorthand.
* _.dropWhile(users, ['active', false]);
* // => objects for ['pebbles']
*
* // The `_.property` iteratee shorthand.
* _.dropWhile(users, 'active');
* // => objects for ['barney', 'fred', 'pebbles']
*/
function dropWhile(array, predicate) {
return (array && array.length)
? baseWhile(array, getIteratee(predicate, 3), true)
: [];
}
/**
* Fills elements of `array` with `value` from `start` up to, but not
* including, `end`.
*
* **Note:** This method mutates `array`.
*
* @static
* @memberOf _
* @since 3.2.0
* @category Array
* @param {Array} array The array to fill.
* @param {*} value The value to fill `array` with.
* @param {number} [start=0] The start position.
* @param {number} [end=array.length] The end position.
* @returns {Array} Returns `array`.
* @example
*
* var array = [1, 2, 3];
*
* _.fill(array, 'a');
* console.log(array);
* // => ['a', 'a', 'a']
*
* _.fill(Array(3), 2);
* // => [2, 2, 2]
*
* _.fill([4, 6, 8, 10], '*', 1, 3);
* // => [4, '*', '*', 10]
*/
function fill(array, value, start, end) {
var length = array == null ? 0 : array.length;
if (!length) {
return [];
}
if (start && typeof start != 'number' && isIterateeCall(array, value, start)) {
start = 0;
end = length;
}
return baseFill(array, value, start, end);
}
/**
* This method is like `_.find` except that it returns the index of the first
* element `predicate` returns truthy for instead of the element itself.
*
* @static
* @memberOf _
* @since 1.1.0
* @category Array
* @param {Array} array The array to inspect.
* @param {Function} [predicate=_.identity] The function invoked per iteration.
* @param {number} [fromIndex=0] The index to search from.
* @returns {number} Returns the index of the found element, else `-1`.
* @example
*
* var users = [
* { 'user': 'barney', 'active': false },
* { 'user': 'fred', 'active': false },
* { 'user': 'pebbles', 'active': true }
* ];
*
* _.findIndex(users, function(o) { return o.user == 'barney'; });
* // => 0
*
* // The `_.matches` iteratee shorthand.
* _.findIndex(users, { 'user': 'fred', 'active': false });
* // => 1
*
* // The `_.matchesProperty` iteratee shorthand.
* _.findIndex(users, ['active', false]);
* // => 0
*
* // The `_.property` iteratee shorthand.
* _.findIndex(users, 'active');
* // => 2
*/
function findIndex(array, predicate, fromIndex) {
var length = array == null ? 0 : array.length;
if (!length) {
return -1;
}
var index = fromIndex == null ? 0 : toInteger(fromIndex);
if (index < 0) {
index = nativeMax(length + index, 0);
}
return baseFindIndex(array, getIteratee(predicate, 3), index);
}
/**
* This method is like `_.findIndex` except that it iterates over elements
* of `collection` from right to left.
*
* @static
* @memberOf _
* @since 2.0.0
* @category Array
* @param {Array} array The array to inspect.
* @param {Function} [predicate=_.identity] The function invoked per iteration.
* @param {number} [fromIndex=array.length-1] The index to search from.
* @returns {number} Returns the index of the found element, else `-1`.
* @example
*
* var users = [
* { 'user': 'barney', 'active': true },
* { 'user': 'fred', 'active': false },
* { 'user': 'pebbles', 'active': false }
* ];
*
* _.findLastIndex(users, function(o) { return o.user == 'pebbles'; });
* // => 2
*
* // The `_.matches` iteratee shorthand.
* _.findLastIndex(users, { 'user': 'barney', 'active': true });
* // => 0
*
* // The `_.matchesProperty` iteratee shorthand.
* _.findLastIndex(users, ['active', false]);
* // => 2
*
* // The `_.property` iteratee shorthand.
* _.findLastIndex(users, 'active');
* // => 0
*/
function findLastIndex(array, predicate, fromIndex) {
var length = array == null ? 0 : array.length;
if (!length) {
return -1;
}
var index = length - 1;
if (fromIndex !== undefined) {
index = toInteger(fromIndex);
index = fromIndex < 0
? nativeMax(length + index, 0)
: nativeMin(index, length - 1);
}
return baseFindIndex(array, getIteratee(predicate, 3), index, true);
}
/**
* Flattens `array` a single level deep.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Array
* @param {Array} array The array to flatten.
* @returns {Array} Returns the new flattened array.
* @example
*
* _.flatten([1, [2, [3, [4]], 5]]);
* // => [1, 2, [3, [4]], 5]
*/
function flatten(array) {
var length = array == null ? 0 : array.length;
return length ? baseFlatten(array, 1) : [];
}
/**
* Recursively flattens `array`.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Array
* @param {Array} array The array to flatten.
* @returns {Array} Returns the new flattened array.
* @example
*
* _.flattenDeep([1, [2, [3, [4]], 5]]);
* // => [1, 2, 3, 4, 5]
*/
function flattenDeep(array) {
var length = array == null ? 0 : array.length;
return length ? baseFlatten(array, INFINITY) : [];
}
/**
* Recursively flatten `array` up to `depth` times.
*
* @static
* @memberOf _
* @since 4.4.0
* @category Array
* @param {Array} array The array to flatten.
* @param {number} [depth=1] The maximum recursion depth.
* @returns {Array} Returns the new flattened array.
* @example
*
* var array = [1, [2, [3, [4]], 5]];
*
* _.flattenDepth(array, 1);
* // => [1, 2, [3, [4]], 5]
*
* _.flattenDepth(array, 2);
* // => [1, 2, 3, [4], 5]
*/
function flattenDepth(array, depth) {
var length = array == null ? 0 : array.length;
if (!length) {
return [];
}
depth = depth === undefined ? 1 : toInteger(depth);
return baseFlatten(array, depth);
}
/**
* The inverse of `_.toPairs`; this method returns an object composed
* from key-value `pairs`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Array
* @param {Array} pairs The key-value pairs.
* @returns {Object} Returns the new object.
* @example
*
* _.fromPairs([['a', 1], ['b', 2]]);
* // => { 'a': 1, 'b': 2 }
*/
function fromPairs(pairs) {
var index = -1,
length = pairs == null ? 0 : pairs.length,
result = {};
while (++index < length) {
var pair = pairs[index];
result[pair[0]] = pair[1];
}
return result;
}
/**
* Gets the first element of `array`.
*
* @static
* @memberOf _
* @since 0.1.0
* @alias first
* @category Array
* @param {Array} array The array to query.
* @returns {*} Returns the first element of `array`.
* @example
*
* _.head([1, 2, 3]);
* // => 1
*
* _.head([]);
* // => undefined
*/
function head(array) {
return (array && array.length) ? array[0] : undefined;
}
/**
* Gets the index at which the first occurrence of `value` is found in `array`
* using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
* for equality comparisons. If `fromIndex` is negative, it's used as the
* offset from the end of `array`.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Array
* @param {Array} array The array to inspect.
* @param {*} value The value to search for.
* @param {number} [fromIndex=0] The index to search from.
* @returns {number} Returns the index of the matched value, else `-1`.
* @example
*
* _.indexOf([1, 2, 1, 2], 2);
* // => 1
*
* // Search from the `fromIndex`.
* _.indexOf([1, 2, 1, 2], 2, 2);
* // => 3
*/
function indexOf(array, value, fromIndex) {
var length = array == null ? 0 : array.length;
if (!length) {
return -1;
}
var index = fromIndex == null ? 0 : toInteger(fromIndex);
if (index < 0) {
index = nativeMax(length + index, 0);
}
return baseIndexOf(array, value, index);
}
/**
* Gets all but the last element of `array`.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Array
* @param {Array} array The array to query.
* @returns {Array} Returns the slice of `array`.
* @example
*
* _.initial([1, 2, 3]);
* // => [1, 2]
*/
function initial(array) {
var length = array == null ? 0 : array.length;
return length ? baseSlice(array, 0, -1) : [];
}
/**
* Creates an array of unique values that are included in all given arrays
* using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
* for equality comparisons. The order and references of result values are
* determined by the first array.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Array
* @param {...Array} [arrays] The arrays to inspect.
* @returns {Array} Returns the new array of intersecting values.
* @example
*
* _.intersection([2, 1], [2, 3]);
* // => [2]
*/
var intersection = baseRest(function(arrays) {
var mapped = arrayMap(arrays, castArrayLikeObject);
return (mapped.length && mapped[0] === arrays[0])
? baseIntersection(mapped)
: [];
});
/**
* This method is like `_.intersection` except that it accepts `iteratee`
* which is invoked for each element of each `arrays` to generate the criterion
* by which they're compared. The order and references of result values are
* determined by the first array. The iteratee is invoked with one argument:
* (value).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Array
* @param {...Array} [arrays] The arrays to inspect.
* @param {Function} [iteratee=_.identity] The iteratee invoked per element.
* @returns {Array} Returns the new array of intersecting values.
* @example
*
* _.intersectionBy([2.1, 1.2], [2.3, 3.4], Math.floor);
* // => [2.1]
*
* // The `_.property` iteratee shorthand.
* _.intersectionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
* // => [{ 'x': 1 }]
*/
var intersectionBy = baseRest(function(arrays) {
var iteratee = last(arrays),
mapped = arrayMap(arrays, castArrayLikeObject);
if (iteratee === last(mapped)) {
iteratee = undefined;
} else {
mapped.pop();
}
return (mapped.length && mapped[0] === arrays[0])
? baseIntersection(mapped, getIteratee(iteratee, 2))
: [];
});
/**
* This method is like `_.intersection` except that it accepts `comparator`
* which is invoked to compare elements of `arrays`. The order and references
* of result values are determined by the first array. The comparator is
* invoked with two arguments: (arrVal, othVal).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Array
* @param {...Array} [arrays] The arrays to inspect.
* @param {Function} [comparator] The comparator invoked per element.
* @returns {Array} Returns the new array of intersecting values.
* @example
*
* var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
* var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
*
* _.intersectionWith(objects, others, _.isEqual);
* // => [{ 'x': 1, 'y': 2 }]
*/
var intersectionWith = baseRest(function(arrays) {
var comparator = last(arrays),
mapped = arrayMap(arrays, castArrayLikeObject);
comparator = typeof comparator == 'function' ? comparator : undefined;
if (comparator) {
mapped.pop();
}
return (mapped.length && mapped[0] === arrays[0])
? baseIntersection(mapped, undefined, comparator)
: [];
});
/**
* Converts all elements in `array` into a string separated by `separator`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Array
* @param {Array} array The array to convert.
* @param {string} [separator=','] The element separator.
* @returns {string} Returns the joined string.
* @example
*
* _.join(['a', 'b', 'c'], '~');
* // => 'a~b~c'
*/
function join(array, separator) {
return array == null ? '' : nativeJoin.call(array, separator);
}
/**
* Gets the last element of `array`.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Array
* @param {Array} array The array to query.
* @returns {*} Returns the last element of `array`.
* @example
*
* _.last([1, 2, 3]);
* // => 3
*/
function last(array) {
var length = array == null ? 0 : array.length;
return length ? array[length - 1] : undefined;
}
/**
* This method is like `_.indexOf` except that it iterates over elements of
* `array` from right to left.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Array
* @param {Array} array The array to inspect.
* @param {*} value The value to search for.
* @param {number} [fromIndex=array.length-1] The index to search from.
* @returns {number} Returns the index of the matched value, else `-1`.
* @example
*
* _.lastIndexOf([1, 2, 1, 2], 2);
* // => 3
*
* // Search from the `fromIndex`.
* _.lastIndexOf([1, 2, 1, 2], 2, 2);
* // => 1
*/
function lastIndexOf(array, value, fromIndex) {
var length = array == null ? 0 : array.length;
if (!length) {
return -1;
}
var index = length;
if (fromIndex !== undefined) {
index = toInteger(fromIndex);
index = index < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1);
}
return value === value
? strictLastIndexOf(array, value, index)
: baseFindIndex(array, baseIsNaN, index, true);
}
/**
* Gets the element at index `n` of `array`. If `n` is negative, the nth
* element from the end is returned.
*
* @static
* @memberOf _
* @since 4.11.0
* @category Array
* @param {Array} array The array to query.
* @param {number} [n=0] The index of the element to return.
* @returns {*} Returns the nth element of `array`.
* @example
*
* var array = ['a', 'b', 'c', 'd'];
*
* _.nth(array, 1);
* // => 'b'
*
* _.nth(array, -2);
* // => 'c';
*/
function nth(array, n) {
return (array && array.length) ? baseNth(array, toInteger(n)) : undefined;
}
/**
* Removes all given values from `array` using
* [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
* for equality comparisons.
*
* **Note:** Unlike `_.without`, this method mutates `array`. Use `_.remove`
* to remove elements from an array by predicate.
*
* @static
* @memberOf _
* @since 2.0.0
* @category Array
* @param {Array} array The array to modify.
* @param {...*} [values] The values to remove.
* @returns {Array} Returns `array`.
* @example
*
* var array = ['a', 'b', 'c', 'a', 'b', 'c'];
*
* _.pull(array, 'a', 'c');
* console.log(array);
* // => ['b', 'b']
*/
var pull = baseRest(pullAll);
/**
* This method is like `_.pull` except that it accepts an array of values to remove.
*
* **Note:** Unlike `_.difference`, this method mutates `array`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Array
* @param {Array} array The array to modify.
* @param {Array} values The values to remove.
* @returns {Array} Returns `array`.
* @example
*
* var array = ['a', 'b', 'c', 'a', 'b', 'c'];
*
* _.pullAll(array, ['a', 'c']);
* console.log(array);
* // => ['b', 'b']
*/
function pullAll(array, values) {
return (array && array.length && values && values.length)
? basePullAll(array, values)
: array;
}
/**
* This method is like `_.pullAll` except that it accepts `iteratee` which is
* invoked for each element of `array` and `values` to generate the criterion
* by which they're compared. The iteratee is invoked with one argument: (value).
*
* **Note:** Unlike `_.differenceBy`, this method mutates `array`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Array
* @param {Array} array The array to modify.
* @param {Array} values The values to remove.
* @param {Function} [iteratee=_.identity] The iteratee invoked per element.
* @returns {Array} Returns `array`.
* @example
*
* var array = [{ 'x': 1 }, { 'x': 2 }, { 'x': 3 }, { 'x': 1 }];
*
* _.pullAllBy(array, [{ 'x': 1 }, { 'x': 3 }], 'x');
* console.log(array);
* // => [{ 'x': 2 }]
*/
function pullAllBy(array, values, iteratee) {
return (array && array.length && values && values.length)
? basePullAll(array, values, getIteratee(iteratee, 2))
: array;
}
/**
* This method is like `_.pullAll` except that it accepts `comparator` which
* is invoked to compare elements of `array` to `values`. The comparator is
* invoked with two arguments: (arrVal, othVal).
*
* **Note:** Unlike `_.differenceWith`, this method mutates `array`.
*
* @static
* @memberOf _
* @since 4.6.0
* @category Array
* @param {Array} array The array to modify.
* @param {Array} values The values to remove.
* @param {Function} [comparator] The comparator invoked per element.
* @returns {Array} Returns `array`.
* @example
*
* var array = [{ 'x': 1, 'y': 2 }, { 'x': 3, 'y': 4 }, { 'x': 5, 'y': 6 }];
*
* _.pullAllWith(array, [{ 'x': 3, 'y': 4 }], _.isEqual);
* console.log(array);
* // => [{ 'x': 1, 'y': 2 }, { 'x': 5, 'y': 6 }]
*/
function pullAllWith(array, values, comparator) {
return (array && array.length && values && values.length)
? basePullAll(array, values, undefined, comparator)
: array;
}
/**
* Removes elements from `array` corresponding to `indexes` and returns an
* array of removed elements.
*
* **Note:** Unlike `_.at`, this method mutates `array`.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Array
* @param {Array} array The array to modify.
* @param {...(number|number[])} [indexes] The indexes of elements to remove.
* @returns {Array} Returns the new array of removed elements.
* @example
*
* var array = ['a', 'b', 'c', 'd'];
* var pulled = _.pullAt(array, [1, 3]);
*
* console.log(array);
* // => ['a', 'c']
*
* console.log(pulled);
* // => ['b', 'd']
*/
var pullAt = flatRest(function(array, indexes) {
var length = array == null ? 0 : array.length,
result = baseAt(array, indexes);
basePullAt(array, arrayMap(indexes, function(index) {
return isIndex(index, length) ? +index : index;
}).sort(compareAscending));
return result;
});
/**
* Removes all elements from `array` that `predicate` returns truthy for
* and returns an array of the removed elements. The predicate is invoked
* with three arguments: (value, index, array).
*
* **Note:** Unlike `_.filter`, this method mutates `array`. Use `_.pull`
* to pull elements from an array by value.
*
* @static
* @memberOf _
* @since 2.0.0
* @category Array
* @param {Array} array The array to modify.
* @param {Function} [predicate=_.identity] The function invoked per iteration.
* @returns {Array} Returns the new array of removed elements.
* @example
*
* var array = [1, 2, 3, 4];
* var evens = _.remove(array, function(n) {
* return n % 2 == 0;
* });
*
* console.log(array);
* // => [1, 3]
*
* console.log(evens);
* // => [2, 4]
*/
function remove(array, predicate) {
var result = [];
if (!(array && array.length)) {
return result;
}
var index = -1,
indexes = [],
length = array.length;
predicate = getIteratee(predicate, 3);
while (++index < length) {
var value = array[index];
if (predicate(value, index, array)) {
result.push(value);
indexes.push(index);
}
}
basePullAt(array, indexes);
return result;
}
/**
* Reverses `array` so that the first element becomes the last, the second
* element becomes the second to last, and so on.
*
* **Note:** This method mutates `array` and is based on
* [`Array#reverse`](https://mdn.io/Array/reverse).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Array
* @param {Array} array The array to modify.
* @returns {Array} Returns `array`.
* @example
*
* var array = [1, 2, 3];
*
* _.reverse(array);
* // => [3, 2, 1]
*
* console.log(array);
* // => [3, 2, 1]
*/
function reverse(array) {
return array == null ? array : nativeReverse.call(array);
}
/**
* Creates a slice of `array` from `start` up to, but not including, `end`.
*
* **Note:** This method is used instead of
* [`Array#slice`](https://mdn.io/Array/slice) to ensure dense arrays are
* returned.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Array
* @param {Array} array The array to slice.
* @param {number} [start=0] The start position.
* @param {number} [end=array.length] The end position.
* @returns {Array} Returns the slice of `array`.
*/
function slice(array, start, end) {
var length = array == null ? 0 : array.length;
if (!length) {
return [];
}
if (end && typeof end != 'number' && isIterateeCall(array, start, end)) {
start = 0;
end = length;
}
else {
start = start == null ? 0 : toInteger(start);
end = end === undefined ? length : toInteger(end);
}
return baseSlice(array, start, end);
}
/**
* Uses a binary search to determine the lowest index at which `value`
* should be inserted into `array` in order to maintain its sort order.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Array
* @param {Array} array The sorted array to inspect.
* @param {*} value The value to evaluate.
* @returns {number} Returns the index at which `value` should be inserted
* into `array`.
* @example
*
* _.sortedIndex([30, 50], 40);
* // => 1
*/
function sortedIndex(array, value) {
return baseSortedIndex(array, value);
}
/**
* This method is like `_.sortedIndex` except that it accepts `iteratee`
* which is invoked for `value` and each element of `array` to compute their
* sort ranking. The iteratee is invoked with one argument: (value).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Array
* @param {Array} array The sorted array to inspect.
* @param {*} value The value to evaluate.
* @param {Function} [iteratee=_.identity] The iteratee invoked per element.
* @returns {number} Returns the index at which `value` should be inserted
* into `array`.
* @example
*
* var objects = [{ 'x': 4 }, { 'x': 5 }];
*
* _.sortedIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
* // => 0
*
* // The `_.property` iteratee shorthand.
* _.sortedIndexBy(objects, { 'x': 4 }, 'x');
* // => 0
*/
function sortedIndexBy(array, value, iteratee) {
return baseSortedIndexBy(array, value, getIteratee(iteratee, 2));
}
/**
* This method is like `_.indexOf` except that it performs a binary
* search on a sorted `array`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Array
* @param {Array} array The array to inspect.
* @param {*} value The value to search for.
* @returns {number} Returns the index of the matched value, else `-1`.
* @example
*
* _.sortedIndexOf([4, 5, 5, 5, 6], 5);
* // => 1
*/
function sortedIndexOf(array, value) {
var length = array == null ? 0 : array.length;
if (length) {
var index = baseSortedIndex(array, value);
if (index < length && eq(array[index], value)) {
return index;
}
}
return -1;
}
/**
* This method is like `_.sortedIndex` except that it returns the highest
* index at which `value` should be inserted into `array` in order to
* maintain its sort order.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Array
* @param {Array} array The sorted array to inspect.
* @param {*} value The value to evaluate.
* @returns {number} Returns the index at which `value` should be inserted
* into `array`.
* @example
*
* _.sortedLastIndex([4, 5, 5, 5, 6], 5);
* // => 4
*/
function sortedLastIndex(array, value) {
return baseSortedIndex(array, value, true);
}
/**
* This method is like `_.sortedLastIndex` except that it accepts `iteratee`
* which is invoked for `value` and each element of `array` to compute their
* sort ranking. The iteratee is invoked with one argument: (value).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Array
* @param {Array} array The sorted array to inspect.
* @param {*} value The value to evaluate.
* @param {Function} [iteratee=_.identity] The iteratee invoked per element.
* @returns {number} Returns the index at which `value` should be inserted
* into `array`.
* @example
*
* var objects = [{ 'x': 4 }, { 'x': 5 }];
*
* _.sortedLastIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
* // => 1
*
* // The `_.property` iteratee shorthand.
* _.sortedLastIndexBy(objects, { 'x': 4 }, 'x');
* // => 1
*/
function sortedLastIndexBy(array, value, iteratee) {
return baseSortedIndexBy(array, value, getIteratee(iteratee, 2), true);
}
/**
* This method is like `_.lastIndexOf` except that it performs a binary
* search on a sorted `array`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Array
* @param {Array} array The array to inspect.
* @param {*} value The value to search for.
* @returns {number} Returns the index of the matched value, else `-1`.
* @example
*
* _.sortedLastIndexOf([4, 5, 5, 5, 6], 5);
* // => 3
*/
function sortedLastIndexOf(array, value) {
var length = array == null ? 0 : array.length;
if (length) {
var index = baseSortedIndex(array, value, true) - 1;
if (eq(array[index], value)) {
return index;
}
}
return -1;
}
/**
* This method is like `_.uniq` except that it's designed and optimized
* for sorted arrays.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Array
* @param {Array} array The array to inspect.
* @returns {Array} Returns the new duplicate free array.
* @example
*
* _.sortedUniq([1, 1, 2]);
* // => [1, 2]
*/
function sortedUniq(array) {
return (array && array.length)
? baseSortedUniq(array)
: [];
}
/**
* This method is like `_.uniqBy` except that it's designed and optimized
* for sorted arrays.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Array
* @param {Array} array The array to inspect.
* @param {Function} [iteratee] The iteratee invoked per element.
* @returns {Array} Returns the new duplicate free array.
* @example
*
* _.sortedUniqBy([1.1, 1.2, 2.3, 2.4], Math.floor);
* // => [1.1, 2.3]
*/
function sortedUniqBy(array, iteratee) {
return (array && array.length)
? baseSortedUniq(array, getIteratee(iteratee, 2))
: [];
}
/**
* Gets all but the first element of `array`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Array
* @param {Array} array The array to query.
* @returns {Array} Returns the slice of `array`.
* @example
*
* _.tail([1, 2, 3]);
* // => [2, 3]
*/
function tail(array) {
var length = array == null ? 0 : array.length;
return length ? baseSlice(array, 1, length) : [];
}
/**
* Creates a slice of `array` with `n` elements taken from the beginning.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Array
* @param {Array} array The array to query.
* @param {number} [n=1] The number of elements to take.
* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
* @returns {Array} Returns the slice of `array`.
* @example
*
* _.take([1, 2, 3]);
* // => [1]
*
* _.take([1, 2, 3], 2);
* // => [1, 2]
*
* _.take([1, 2, 3], 5);
* // => [1, 2, 3]
*
* _.take([1, 2, 3], 0);
* // => []
*/
function take(array, n, guard) {
if (!(array && array.length)) {
return [];
}
n = (guard || n === undefined) ? 1 : toInteger(n);
return baseSlice(array, 0, n < 0 ? 0 : n);
}
/**
* Creates a slice of `array` with `n` elements taken from the end.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Array
* @param {Array} array The array to query.
* @param {number} [n=1] The number of elements to take.
* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
* @returns {Array} Returns the slice of `array`.
* @example
*
* _.takeRight([1, 2, 3]);
* // => [3]
*
* _.takeRight([1, 2, 3], 2);
* // => [2, 3]
*
* _.takeRight([1, 2, 3], 5);
* // => [1, 2, 3]
*
* _.takeRight([1, 2, 3], 0);
* // => []
*/
function takeRight(array, n, guard) {
var length = array == null ? 0 : array.length;
if (!length) {
return [];
}
n = (guard || n === undefined) ? 1 : toInteger(n);
n = length - n;
return baseSlice(array, n < 0 ? 0 : n, length);
}
/**
* Creates a slice of `array` with elements taken from the end. Elements are
* taken until `predicate` returns falsey. The predicate is invoked with
* three arguments: (value, index, array).
*
* @static
* @memberOf _
* @since 3.0.0
* @category Array
* @param {Array} array The array to query.
* @param {Function} [predicate=_.identity] The function invoked per iteration.
* @returns {Array} Returns the slice of `array`.
* @example
*
* var users = [
* { 'user': 'barney', 'active': true },
* { 'user': 'fred', 'active': false },
* { 'user': 'pebbles', 'active': false }
* ];
*
* _.takeRightWhile(users, function(o) { return !o.active; });
* // => objects for ['fred', 'pebbles']
*
* // The `_.matches` iteratee shorthand.
* _.takeRightWhile(users, { 'user': 'pebbles', 'active': false });
* // => objects for ['pebbles']
*
* // The `_.matchesProperty` iteratee shorthand.
* _.takeRightWhile(users, ['active', false]);
* // => objects for ['fred', 'pebbles']
*
* // The `_.property` iteratee shorthand.
* _.takeRightWhile(users, 'active');
* // => []
*/
function takeRightWhile(array, predicate) {
return (array && array.length)
? baseWhile(array, getIteratee(predicate, 3), false, true)
: [];
}
/**
* Creates a slice of `array` with elements taken from the beginning. Elements
* are taken until `predicate` returns falsey. The predicate is invoked with
* three arguments: (value, index, array).
*
* @static
* @memberOf _
* @since 3.0.0
* @category Array
* @param {Array} array The array to query.
* @param {Function} [predicate=_.identity] The function invoked per iteration.
* @returns {Array} Returns the slice of `array`.
* @example
*
* var users = [
* { 'user': 'barney', 'active': false },
* { 'user': 'fred', 'active': false},
* { 'user': 'pebbles', 'active': true }
* ];
*
* _.takeWhile(users, function(o) { return !o.active; });
* // => objects for ['barney', 'fred']
*
* // The `_.matches` iteratee shorthand.
* _.takeWhile(users, { 'user': 'barney', 'active': false });
* // => objects for ['barney']
*
* // The `_.matchesProperty` iteratee shorthand.
* _.takeWhile(users, ['active', false]);
* // => objects for ['barney', 'fred']
*
* // The `_.property` iteratee shorthand.
* _.takeWhile(users, 'active');
* // => []
*/
function takeWhile(array, predicate) {
return (array && array.length)
? baseWhile(array, getIteratee(predicate, 3))
: [];
}
/**
* Creates an array of unique values, in order, from all given arrays using
* [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
* for equality comparisons.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Array
* @param {...Array} [arrays] The arrays to inspect.
* @returns {Array} Returns the new array of combined values.
* @example
*
* _.union([2], [1, 2]);
* // => [2, 1]
*/
var union = baseRest(function(arrays) {
return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true));
});
/**
* This method is like `_.union` except that it accepts `iteratee` which is
* invoked for each element of each `arrays` to generate the criterion by
* which uniqueness is computed. Result values are chosen from the first
* array in which the value occurs. The iteratee is invoked with one argument:
* (value).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Array
* @param {...Array} [arrays] The arrays to inspect.
* @param {Function} [iteratee=_.identity] The iteratee invoked per element.
* @returns {Array} Returns the new array of combined values.
* @example
*
* _.unionBy([2.1], [1.2, 2.3], Math.floor);
* // => [2.1, 1.2]
*
* // The `_.property` iteratee shorthand.
* _.unionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
* // => [{ 'x': 1 }, { 'x': 2 }]
*/
var unionBy = baseRest(function(arrays) {
var iteratee = last(arrays);
if (isArrayLikeObject(iteratee)) {
iteratee = undefined;
}
return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), getIteratee(iteratee, 2));
});
/**
* This method is like `_.union` except that it accepts `comparator` which
* is invoked to compare elements of `arrays`. Result values are chosen from
* the first array in which the value occurs. The comparator is invoked
* with two arguments: (arrVal, othVal).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Array
* @param {...Array} [arrays] The arrays to inspect.
* @param {Function} [comparator] The comparator invoked per element.
* @returns {Array} Returns the new array of combined values.
* @example
*
* var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
* var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
*
* _.unionWith(objects, others, _.isEqual);
* // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
*/
var unionWith = baseRest(function(arrays) {
var comparator = last(arrays);
comparator = typeof comparator == 'function' ? comparator : undefined;
return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), undefined, comparator);
});
/**
* Creates a duplicate-free version of an array, using
* [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
* for equality comparisons, in which only the first occurrence of each element
* is kept. The order of result values is determined by the order they occur
* in the array.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Array
* @param {Array} array The array to inspect.
* @returns {Array} Returns the new duplicate free array.
* @example
*
* _.uniq([2, 1, 2]);
* // => [2, 1]
*/
function uniq(array) {
return (array && array.length) ? baseUniq(array) : [];
}
/**
* This method is like `_.uniq` except that it accepts `iteratee` which is
* invoked for each element in `array` to generate the criterion by which
* uniqueness is computed. The order of result values is determined by the
* order they occur in the array. The iteratee is invoked with one argument:
* (value).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Array
* @param {Array} array The array to inspect.
* @param {Function} [iteratee=_.identity] The iteratee invoked per element.
* @returns {Array} Returns the new duplicate free array.
* @example
*
* _.uniqBy([2.1, 1.2, 2.3], Math.floor);
* // => [2.1, 1.2]
*
* // The `_.property` iteratee shorthand.
* _.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
* // => [{ 'x': 1 }, { 'x': 2 }]
*/
function uniqBy(array, iteratee) {
return (array && array.length) ? baseUniq(array, getIteratee(iteratee, 2)) : [];
}
/**
* This method is like `_.uniq` except that it accepts `comparator` which
* is invoked to compare elements of `array`. The order of result values is
* determined by the order they occur in the array.The comparator is invoked
* with two arguments: (arrVal, othVal).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Array
* @param {Array} array The array to inspect.
* @param {Function} [comparator] The comparator invoked per element.
* @returns {Array} Returns the new duplicate free array.
* @example
*
* var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 2 }];
*
* _.uniqWith(objects, _.isEqual);
* // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]
*/
function uniqWith(array, comparator) {
comparator = typeof comparator == 'function' ? comparator : undefined;
return (array && array.length) ? baseUniq(array, undefined, comparator) : [];
}
/**
* This method is like `_.zip` except that it accepts an array of grouped
* elements and creates an array regrouping the elements to their pre-zip
* configuration.
*
* @static
* @memberOf _
* @since 1.2.0
* @category Array
* @param {Array} array The array of grouped elements to process.
* @returns {Array} Returns the new array of regrouped elements.
* @example
*
* var zipped = _.zip(['a', 'b'], [1, 2], [true, false]);
* // => [['a', 1, true], ['b', 2, false]]
*
* _.unzip(zipped);
* // => [['a', 'b'], [1, 2], [true, false]]
*/
function unzip(array) {
if (!(array && array.length)) {
return [];
}
var length = 0;
array = arrayFilter(array, function(group) {
if (isArrayLikeObject(group)) {
length = nativeMax(group.length, length);
return true;
}
});
return baseTimes(length, function(index) {
return arrayMap(array, baseProperty(index));
});
}
/**
* This method is like `_.unzip` except that it accepts `iteratee` to specify
* how regrouped values should be combined. The iteratee is invoked with the
* elements of each group: (...group).
*
* @static
* @memberOf _
* @since 3.8.0
* @category Array
* @param {Array} array The array of grouped elements to process.
* @param {Function} [iteratee=_.identity] The function to combine
* regrouped values.
* @returns {Array} Returns the new array of regrouped elements.
* @example
*
* var zipped = _.zip([1, 2], [10, 20], [100, 200]);
* // => [[1, 10, 100], [2, 20, 200]]
*
* _.unzipWith(zipped, _.add);
* // => [3, 30, 300]
*/
function unzipWith(array, iteratee) {
if (!(array && array.length)) {
return [];
}
var result = unzip(array);
if (iteratee == null) {
return result;
}
return arrayMap(result, function(group) {
return apply(iteratee, undefined, group);
});
}
/**
* Creates an array excluding all given values using
* [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
* for equality comparisons.
*
* **Note:** Unlike `_.pull`, this method returns a new array.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Array
* @param {Array} array The array to inspect.
* @param {...*} [values] The values to exclude.
* @returns {Array} Returns the new array of filtered values.
* @see _.difference, _.xor
* @example
*
* _.without([2, 1, 2, 3], 1, 2);
* // => [3]
*/
var without = baseRest(function(array, values) {
return isArrayLikeObject(array)
? baseDifference(array, values)
: [];
});
/**
* Creates an array of unique values that is the
* [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference)
* of the given arrays. The order of result values is determined by the order
* they occur in the arrays.
*
* @static
* @memberOf _
* @since 2.4.0
* @category Array
* @param {...Array} [arrays] The arrays to inspect.
* @returns {Array} Returns the new array of filtered values.
* @see _.difference, _.without
* @example
*
* _.xor([2, 1], [2, 3]);
* // => [1, 3]
*/
var xor = baseRest(function(arrays) {
return baseXor(arrayFilter(arrays, isArrayLikeObject));
});
/**
* This method is like `_.xor` except that it accepts `iteratee` which is
* invoked for each element of each `arrays` to generate the criterion by
* which by which they're compared. The order of result values is determined
* by the order they occur in the arrays. The iteratee is invoked with one
* argument: (value).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Array
* @param {...Array} [arrays] The arrays to inspect.
* @param {Function} [iteratee=_.identity] The iteratee invoked per element.
* @returns {Array} Returns the new array of filtered values.
* @example
*
* _.xorBy([2.1, 1.2], [2.3, 3.4], Math.floor);
* // => [1.2, 3.4]
*
* // The `_.property` iteratee shorthand.
* _.xorBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
* // => [{ 'x': 2 }]
*/
var xorBy = baseRest(function(arrays) {
var iteratee = last(arrays);
if (isArrayLikeObject(iteratee)) {
iteratee = undefined;
}
return baseXor(arrayFilter(arrays, isArrayLikeObject), getIteratee(iteratee, 2));
});
/**
* This method is like `_.xor` except that it accepts `comparator` which is
* invoked to compare elements of `arrays`. The order of result values is
* determined by the order they occur in the arrays. The comparator is invoked
* with two arguments: (arrVal, othVal).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Array
* @param {...Array} [arrays] The arrays to inspect.
* @param {Function} [comparator] The comparator invoked per element.
* @returns {Array} Returns the new array of filtered values.
* @example
*
* var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
* var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
*
* _.xorWith(objects, others, _.isEqual);
* // => [{ 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
*/
var xorWith = baseRest(function(arrays) {
var comparator = last(arrays);
comparator = typeof comparator == 'function' ? comparator : undefined;
return baseXor(arrayFilter(arrays, isArrayLikeObject), undefined, comparator);
});
/**
* Creates an array of grouped elements, the first of which contains the
* first elements of the given arrays, the second of which contains the
* second elements of the given arrays, and so on.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Array
* @param {...Array} [arrays] The arrays to process.
* @returns {Array} Returns the new array of grouped elements.
* @example
*
* _.zip(['a', 'b'], [1, 2], [true, false]);
* // => [['a', 1, true], ['b', 2, false]]
*/
var zip = baseRest(unzip);
/**
* This method is like `_.fromPairs` except that it accepts two arrays,
* one of property identifiers and one of corresponding values.
*
* @static
* @memberOf _
* @since 0.4.0
* @category Array
* @param {Array} [props=[]] The property identifiers.
* @param {Array} [values=[]] The property values.
* @returns {Object} Returns the new object.
* @example
*
* _.zipObject(['a', 'b'], [1, 2]);
* // => { 'a': 1, 'b': 2 }
*/
function zipObject(props, values) {
return baseZipObject(props || [], values || [], assignValue);
}
/**
* This method is like `_.zipObject` except that it supports property paths.
*
* @static
* @memberOf _
* @since 4.1.0
* @category Array
* @param {Array} [props=[]] The property identifiers.
* @param {Array} [values=[]] The property values.
* @returns {Object} Returns the new object.
* @example
*
* _.zipObjectDeep(['a.b[0].c', 'a.b[1].d'], [1, 2]);
* // => { 'a': { 'b': [{ 'c': 1 }, { 'd': 2 }] } }
*/
function zipObjectDeep(props, values) {
return baseZipObject(props || [], values || [], baseSet);
}
/**
* This method is like `_.zip` except that it accepts `iteratee` to specify
* how grouped values should be combined. The iteratee is invoked with the
* elements of each group: (...group).
*
* @static
* @memberOf _
* @since 3.8.0
* @category Array
* @param {...Array} [arrays] The arrays to process.
* @param {Function} [iteratee=_.identity] The function to combine
* grouped values.
* @returns {Array} Returns the new array of grouped elements.
* @example
*
* _.zipWith([1, 2], [10, 20], [100, 200], function(a, b, c) {
* return a + b + c;
* });
* // => [111, 222]
*/
var zipWith = baseRest(function(arrays) {
var length = arrays.length,
iteratee = length > 1 ? arrays[length - 1] : undefined;
iteratee = typeof iteratee == 'function' ? (arrays.pop(), iteratee) : undefined;
return unzipWith(arrays, iteratee);
});
/*------------------------------------------------------------------------*/
/**
* Creates a `lodash` wrapper instance that wraps `value` with explicit method
* chain sequences enabled. The result of such sequences must be unwrapped
* with `_#value`.
*
* @static
* @memberOf _
* @since 1.3.0
* @category Seq
* @param {*} value The value to wrap.
* @returns {Object} Returns the new `lodash` wrapper instance.
* @example
*
* var users = [
* { 'user': 'barney', 'age': 36 },
* { 'user': 'fred', 'age': 40 },
* { 'user': 'pebbles', 'age': 1 }
* ];
*
* var youngest = _
* .chain(users)
* .sortBy('age')
* .map(function(o) {
* return o.user + ' is ' + o.age;
* })
* .head()
* .value();
* // => 'pebbles is 1'
*/
function chain(value) {
var result = lodash(value);
result.__chain__ = true;
return result;
}
/**
* This method invokes `interceptor` and returns `value`. The interceptor
* is invoked with one argument; (value). The purpose of this method is to
* "tap into" a method chain sequence in order to modify intermediate results.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Seq
* @param {*} value The value to provide to `interceptor`.
* @param {Function} interceptor The function to invoke.
* @returns {*} Returns `value`.
* @example
*
* _([1, 2, 3])
* .tap(function(array) {
* // Mutate input array.
* array.pop();
* })
* .reverse()
* .value();
* // => [2, 1]
*/
function tap(value, interceptor) {
interceptor(value);
return value;
}
/**
* This method is like `_.tap` except that it returns the result of `interceptor`.
* The purpose of this method is to "pass thru" values replacing intermediate
* results in a method chain sequence.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Seq
* @param {*} value The value to provide to `interceptor`.
* @param {Function} interceptor The function to invoke.
* @returns {*} Returns the result of `interceptor`.
* @example
*
* _(' abc ')
* .chain()
* .trim()
* .thru(function(value) {
* return [value];
* })
* .value();
* // => ['abc']
*/
function thru(value, interceptor) {
return interceptor(value);
}
/**
* This method is the wrapper version of `_.at`.
*
* @name at
* @memberOf _
* @since 1.0.0
* @category Seq
* @param {...(string|string[])} [paths] The property paths of elements to pick.
* @returns {Object} Returns the new `lodash` wrapper instance.
* @example
*
* var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
*
* _(object).at(['a[0].b.c', 'a[1]']).value();
* // => [3, 4]
*/
var wrapperAt = flatRest(function(paths) {
var length = paths.length,
start = length ? paths[0] : 0,
value = this.__wrapped__,
interceptor = function(object) { return baseAt(object, paths); };
if (length > 1 || this.__actions__.length ||
!(value instanceof LazyWrapper) || !isIndex(start)) {
return this.thru(interceptor);
}
value = value.slice(start, +start + (length ? 1 : 0));
value.__actions__.push({
'func': thru,
'args': [interceptor],
'thisArg': undefined
});
return new LodashWrapper(value, this.__chain__).thru(function(array) {
if (length && !array.length) {
array.push(undefined);
}
return array;
});
});
/**
* Creates a `lodash` wrapper instance with explicit method chain sequences enabled.
*
* @name chain
* @memberOf _
* @since 0.1.0
* @category Seq
* @returns {Object} Returns the new `lodash` wrapper instance.
* @example
*
* var users = [
* { 'user': 'barney', 'age': 36 },
* { 'user': 'fred', 'age': 40 }
* ];
*
* // A sequence without explicit chaining.
* _(users).head();
* // => { 'user': 'barney', 'age': 36 }
*
* // A sequence with explicit chaining.
* _(users)
* .chain()
* .head()
* .pick('user')
* .value();
* // => { 'user': 'barney' }
*/
function wrapperChain() {
return chain(this);
}
/**
* Executes the chain sequence and returns the wrapped result.
*
* @name commit
* @memberOf _
* @since 3.2.0
* @category Seq
* @returns {Object} Returns the new `lodash` wrapper instance.
* @example
*
* var array = [1, 2];
* var wrapped = _(array).push(3);
*
* console.log(array);
* // => [1, 2]
*
* wrapped = wrapped.commit();
* console.log(array);
* // => [1, 2, 3]
*
* wrapped.last();
* // => 3
*
* console.log(array);
* // => [1, 2, 3]
*/
function wrapperCommit() {
return new LodashWrapper(this.value(), this.__chain__);
}
/**
* Gets the next value on a wrapped object following the
* [iterator protocol](https://mdn.io/iteration_protocols#iterator).
*
* @name next
* @memberOf _
* @since 4.0.0
* @category Seq
* @returns {Object} Returns the next iterator value.
* @example
*
* var wrapped = _([1, 2]);
*
* wrapped.next();
* // => { 'done': false, 'value': 1 }
*
* wrapped.next();
* // => { 'done': false, 'value': 2 }
*
* wrapped.next();
* // => { 'done': true, 'value': undefined }
*/
function wrapperNext() {
if (this.__values__ === undefined) {
this.__values__ = toArray(this.value());
}
var done = this.__index__ >= this.__values__.length,
value = done ? undefined : this.__values__[this.__index__++];
return { 'done': done, 'value': value };
}
/**
* Enables the wrapper to be iterable.
*
* @name Symbol.iterator
* @memberOf _
* @since 4.0.0
* @category Seq
* @returns {Object} Returns the wrapper object.
* @example
*
* var wrapped = _([1, 2]);
*
* wrapped[Symbol.iterator]() === wrapped;
* // => true
*
* Array.from(wrapped);
* // => [1, 2]
*/
function wrapperToIterator() {
return this;
}
/**
* Creates a clone of the chain sequence planting `value` as the wrapped value.
*
* @name plant
* @memberOf _
* @since 3.2.0
* @category Seq
* @param {*} value The value to plant.
* @returns {Object} Returns the new `lodash` wrapper instance.
* @example
*
* function square(n) {
* return n * n;
* }
*
* var wrapped = _([1, 2]).map(square);
* var other = wrapped.plant([3, 4]);
*
* other.value();
* // => [9, 16]
*
* wrapped.value();
* // => [1, 4]
*/
function wrapperPlant(value) {
var result,
parent = this;
while (parent instanceof baseLodash) {
var clone = wrapperClone(parent);
clone.__index__ = 0;
clone.__values__ = undefined;
if (result) {
previous.__wrapped__ = clone;
} else {
result = clone;
}
var previous = clone;
parent = parent.__wrapped__;
}
previous.__wrapped__ = value;
return result;
}
/**
* This method is the wrapper version of `_.reverse`.
*
* **Note:** This method mutates the wrapped array.
*
* @name reverse
* @memberOf _
* @since 0.1.0
* @category Seq
* @returns {Object} Returns the new `lodash` wrapper instance.
* @example
*
* var array = [1, 2, 3];
*
* _(array).reverse().value()
* // => [3, 2, 1]
*
* console.log(array);
* // => [3, 2, 1]
*/
function wrapperReverse() {
var value = this.__wrapped__;
if (value instanceof LazyWrapper) {
var wrapped = value;
if (this.__actions__.length) {
wrapped = new LazyWrapper(this);
}
wrapped = wrapped.reverse();
wrapped.__actions__.push({
'func': thru,
'args': [reverse],
'thisArg': undefined
});
return new LodashWrapper(wrapped, this.__chain__);
}
return this.thru(reverse);
}
/**
* Executes the chain sequence to resolve the unwrapped value.
*
* @name value
* @memberOf _
* @since 0.1.0
* @alias toJSON, valueOf
* @category Seq
* @returns {*} Returns the resolved unwrapped value.
* @example
*
* _([1, 2, 3]).value();
* // => [1, 2, 3]
*/
function wrapperValue() {
return baseWrapperValue(this.__wrapped__, this.__actions__);
}
/*------------------------------------------------------------------------*/
/**
* Creates an object composed of keys generated from the results of running
* each element of `collection` thru `iteratee`. The corresponding value of
* each key is the number of times the key was returned by `iteratee`. The
* iteratee is invoked with one argument: (value).
*
* @static
* @memberOf _
* @since 0.5.0
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} [iteratee=_.identity] The iteratee to transform keys.
* @returns {Object} Returns the composed aggregate object.
* @example
*
* _.countBy([6.1, 4.2, 6.3], Math.floor);
* // => { '4': 1, '6': 2 }
*
* // The `_.property` iteratee shorthand.
* _.countBy(['one', 'two', 'three'], 'length');
* // => { '3': 2, '5': 1 }
*/
var countBy = createAggregator(function(result, value, key) {
if (hasOwnProperty.call(result, key)) {
++result[key];
} else {
baseAssignValue(result, key, 1);
}
});
/**
* Checks if `predicate` returns truthy for **all** elements of `collection`.
* Iteration is stopped once `predicate` returns falsey. The predicate is
* invoked with three arguments: (value, index|key, collection).
*
* **Note:** This method returns `true` for
* [empty collections](https://en.wikipedia.org/wiki/Empty_set) because
* [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of
* elements of empty collections.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} [predicate=_.identity] The function invoked per iteration.
* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
* @returns {boolean} Returns `true` if all elements pass the predicate check,
* else `false`.
* @example
*
* _.every([true, 1, null, 'yes'], Boolean);
* // => false
*
* var users = [
* { 'user': 'barney', 'age': 36, 'active': false },
* { 'user': 'fred', 'age': 40, 'active': false }
* ];
*
* // The `_.matches` iteratee shorthand.
* _.every(users, { 'user': 'barney', 'active': false });
* // => false
*
* // The `_.matchesProperty` iteratee shorthand.
* _.every(users, ['active', false]);
* // => true
*
* // The `_.property` iteratee shorthand.
* _.every(users, 'active');
* // => false
*/
function every(collection, predicate, guard) {
var func = isArray(collection) ? arrayEvery : baseEvery;
if (guard && isIterateeCall(collection, predicate, guard)) {
predicate = undefined;
}
return func(collection, getIteratee(predicate, 3));
}
/**
* Iterates over elements of `collection`, returning an array of all elements
* `predicate` returns truthy for. The predicate is invoked with three
* arguments: (value, index|key, collection).
*
* **Note:** Unlike `_.remove`, this method returns a new array.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} [predicate=_.identity] The function invoked per iteration.
* @returns {Array} Returns the new filtered array.
* @see _.reject
* @example
*
* var users = [
* { 'user': 'barney', 'age': 36, 'active': true },
* { 'user': 'fred', 'age': 40, 'active': false }
* ];
*
* _.filter(users, function(o) { return !o.active; });
* // => objects for ['fred']
*
* // The `_.matches` iteratee shorthand.
* _.filter(users, { 'age': 36, 'active': true });
* // => objects for ['barney']
*
* // The `_.matchesProperty` iteratee shorthand.
* _.filter(users, ['active', false]);
* // => objects for ['fred']
*
* // The `_.property` iteratee shorthand.
* _.filter(users, 'active');
* // => objects for ['barney']
*/
function filter(collection, predicate) {
var func = isArray(collection) ? arrayFilter : baseFilter;
return func(collection, getIteratee(predicate, 3));
}
/**
* Iterates over elements of `collection`, returning the first element
* `predicate` returns truthy for. The predicate is invoked with three
* arguments: (value, index|key, collection).
*
* @static
* @memberOf _
* @since 0.1.0
* @category Collection
* @param {Array|Object} collection The collection to inspect.
* @param {Function} [predicate=_.identity] The function invoked per iteration.
* @param {number} [fromIndex=0] The index to search from.
* @returns {*} Returns the matched element, else `undefined`.
* @example
*
* var users = [
* { 'user': 'barney', 'age': 36, 'active': true },
* { 'user': 'fred', 'age': 40, 'active': false },
* { 'user': 'pebbles', 'age': 1, 'active': true }
* ];
*
* _.find(users, function(o) { return o.age < 40; });
* // => object for 'barney'
*
* // The `_.matches` iteratee shorthand.
* _.find(users, { 'age': 1, 'active': true });
* // => object for 'pebbles'
*
* // The `_.matchesProperty` iteratee shorthand.
* _.find(users, ['active', false]);
* // => object for 'fred'
*
* // The `_.property` iteratee shorthand.
* _.find(users, 'active');
* // => object for 'barney'
*/
var find = createFind(findIndex);
/**
* This method is like `_.find` except that it iterates over elements of
* `collection` from right to left.
*
* @static
* @memberOf _
* @since 2.0.0
* @category Collection
* @param {Array|Object} collection The collection to inspect.
* @param {Function} [predicate=_.identity] The function invoked per iteration.
* @param {number} [fromIndex=collection.length-1] The index to search from.
* @returns {*} Returns the matched element, else `undefined`.
* @example
*
* _.findLast([1, 2, 3, 4], function(n) {
* return n % 2 == 1;
* });
* // => 3
*/
var findLast = createFind(findLastIndex);
/**
* Creates a flattened array of values by running each element in `collection`
* thru `iteratee` and flattening the mapped results. The iteratee is invoked
* with three arguments: (value, index|key, collection).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @returns {Array} Returns the new flattened array.
* @example
*
* function duplicate(n) {
* return [n, n];
* }
*
* _.flatMap([1, 2], duplicate);
* // => [1, 1, 2, 2]
*/
function flatMap(collection, iteratee) {
return baseFlatten(map(collection, iteratee), 1);
}
/**
* This method is like `_.flatMap` except that it recursively flattens the
* mapped results.
*
* @static
* @memberOf _
* @since 4.7.0
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @returns {Array} Returns the new flattened array.
* @example
*
* function duplicate(n) {
* return [[[n, n]]];
* }
*
* _.flatMapDeep([1, 2], duplicate);
* // => [1, 1, 2, 2]
*/
function flatMapDeep(collection, iteratee) {
return baseFlatten(map(collection, iteratee), INFINITY);
}
/**
* This method is like `_.flatMap` except that it recursively flattens the
* mapped results up to `depth` times.
*
* @static
* @memberOf _
* @since 4.7.0
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @param {number} [depth=1] The maximum recursion depth.
* @returns {Array} Returns the new flattened array.
* @example
*
* function duplicate(n) {
* return [[[n, n]]];
* }
*
* _.flatMapDepth([1, 2], duplicate, 2);
* // => [[1, 1], [2, 2]]
*/
function flatMapDepth(collection, iteratee, depth) {
depth = depth === undefined ? 1 : toInteger(depth);
return baseFlatten(map(collection, iteratee), depth);
}
/**
* Iterates over elements of `collection` and invokes `iteratee` for each element.
* The iteratee is invoked with three arguments: (value, index|key, collection).
* Iteratee functions may exit iteration early by explicitly returning `false`.
*
* **Note:** As with other "Collections" methods, objects with a "length"
* property are iterated like arrays. To avoid this behavior use `_.forIn`
* or `_.forOwn` for object iteration.
*
* @static
* @memberOf _
* @since 0.1.0
* @alias each
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @returns {Array|Object} Returns `collection`.
* @see _.forEachRight
* @example
*
* _.forEach([1, 2], function(value) {
* console.log(value);
* });
* // => Logs `1` then `2`.
*
* _.forEach({ 'a': 1, 'b': 2 }, function(value, key) {
* console.log(key);
* });
* // => Logs 'a' then 'b' (iteration order is not guaranteed).
*/
function forEach(collection, iteratee) {
var func = isArray(collection) ? arrayEach : baseEach;
return func(collection, getIteratee(iteratee, 3));
}
/**
* This method is like `_.forEach` except that it iterates over elements of
* `collection` from right to left.
*
* @static
* @memberOf _
* @since 2.0.0
* @alias eachRight
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @returns {Array|Object} Returns `collection`.
* @see _.forEach
* @example
*
* _.forEachRight([1, 2], function(value) {
* console.log(value);
* });
* // => Logs `2` then `1`.
*/
function forEachRight(collection, iteratee) {
var func = isArray(collection) ? arrayEachRight : baseEachRight;
return func(collection, getIteratee(iteratee, 3));
}
/**
* Creates an object composed of keys generated from the results of running
* each element of `collection` thru `iteratee`. The order of grouped values
* is determined by the order they occur in `collection`. The corresponding
* value of each key is an array of elements responsible for generating the
* key. The iteratee is invoked with one argument: (value).
*
* @static
* @memberOf _
* @since 0.1.0
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} [iteratee=_.identity] The iteratee to transform keys.
* @returns {Object} Returns the composed aggregate object.
* @example
*
* _.groupBy([6.1, 4.2, 6.3], Math.floor);
* // => { '4': [4.2], '6': [6.1, 6.3] }
*
* // The `_.property` iteratee shorthand.
* _.groupBy(['one', 'two', 'three'], 'length');
* // => { '3': ['one', 'two'], '5': ['three'] }
*/
var groupBy = createAggregator(function(result, value, key) {
if (hasOwnProperty.call(result, key)) {
result[key].push(value);
} else {
baseAssignValue(result, key, [value]);
}
});
/**
* Checks if `value` is in `collection`. If `collection` is a string, it's
* checked for a substring of `value`, otherwise
* [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
* is used for equality comparisons. If `fromIndex` is negative, it's used as
* the offset from the end of `collection`.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Collection
* @param {Array|Object|string} collection The collection to inspect.
* @param {*} value The value to search for.
* @param {number} [fromIndex=0] The index to search from.
* @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
* @returns {boolean} Returns `true` if `value` is found, else `false`.
* @example
*
* _.includes([1, 2, 3], 1);
* // => true
*
* _.includes([1, 2, 3], 1, 2);
* // => false
*
* _.includes({ 'a': 1, 'b': 2 }, 1);
* // => true
*
* _.includes('abcd', 'bc');
* // => true
*/
function includes(collection, value, fromIndex, guard) {
collection = isArrayLike(collection) ? collection : values(collection);
fromIndex = (fromIndex && !guard) ? toInteger(fromIndex) : 0;
var length = collection.length;
if (fromIndex < 0) {
fromIndex = nativeMax(length + fromIndex, 0);
}
return isString(collection)
? (fromIndex <= length && collection.indexOf(value, fromIndex) > -1)
: (!!length && baseIndexOf(collection, value, fromIndex) > -1);
}
/**
* Invokes the method at `path` of each element in `collection`, returning
* an array of the results of each invoked method. Any additional arguments
* are provided to each invoked method. If `path` is a function, it's invoked
* for, and `this` bound to, each element in `collection`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Array|Function|string} path The path of the method to invoke or
* the function invoked per iteration.
* @param {...*} [args] The arguments to invoke each method with.
* @returns {Array} Returns the array of results.
* @example
*
* _.invokeMap([[5, 1, 7], [3, 2, 1]], 'sort');
* // => [[1, 5, 7], [1, 2, 3]]
*
* _.invokeMap([123, 456], String.prototype.split, '');
* // => [['1', '2', '3'], ['4', '5', '6']]
*/
var invokeMap = baseRest(function(collection, path, args) {
var index = -1,
isFunc = typeof path == 'function',
isProp = isKey(path),
result = isArrayLike(collection) ? Array(collection.length) : [];
baseEach(collection, function(value) {
var func = isFunc ? path : ((isProp && value != null) ? value[path] : undefined);
result[++index] = func ? apply(func, value, args) : baseInvoke(value, path, args);
});
return result;
});
/**
* Creates an object composed of keys generated from the results of running
* each element of `collection` thru `iteratee`. The corresponding value of
* each key is the last element responsible for generating the key. The
* iteratee is invoked with one argument: (value).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} [iteratee=_.identity] The iteratee to transform keys.
* @returns {Object} Returns the composed aggregate object.
* @example
*
* var array = [
* { 'dir': 'left', 'code': 97 },
* { 'dir': 'right', 'code': 100 }
* ];
*
* _.keyBy(array, function(o) {
* return String.fromCharCode(o.code);
* });
* // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
*
* _.keyBy(array, 'dir');
* // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }
*/
var keyBy = createAggregator(function(result, value, key) {
baseAssignValue(result, key, value);
});
/**
* Creates an array of values by running each element in `collection` thru
* `iteratee`. The iteratee is invoked with three arguments:
* (value, index|key, collection).
*
* Many lodash methods are guarded to work as iteratees for methods like
* `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.
*
* The guarded methods are:
* `ary`, `chunk`, `curry`, `curryRight`, `drop`, `dropRight`, `every`,
* `fill`, `invert`, `parseInt`, `random`, `range`, `rangeRight`, `repeat`,
* `sampleSize`, `slice`, `some`, `sortBy`, `split`, `take`, `takeRight`,
* `template`, `trim`, `trimEnd`, `trimStart`, and `words`
*
* @static
* @memberOf _
* @since 0.1.0
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @returns {Array} Returns the new mapped array.
* @example
*
* function square(n) {
* return n * n;
* }
*
* _.map([4, 8], square);
* // => [16, 64]
*
* _.map({ 'a': 4, 'b': 8 }, square);
* // => [16, 64] (iteration order is not guaranteed)
*
* var users = [
* { 'user': 'barney' },
* { 'user': 'fred' }
* ];
*
* // The `_.property` iteratee shorthand.
* _.map(users, 'user');
* // => ['barney', 'fred']
*/
function map(collection, iteratee) {
var func = isArray(collection) ? arrayMap : baseMap;
return func(collection, getIteratee(iteratee, 3));
}
/**
* This method is like `_.sortBy` except that it allows specifying the sort
* orders of the iteratees to sort by. If `orders` is unspecified, all values
* are sorted in ascending order. Otherwise, specify an order of "desc" for
* descending or "asc" for ascending sort order of corresponding values.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Array[]|Function[]|Object[]|string[]} [iteratees=[_.identity]]
* The iteratees to sort by.
* @param {string[]} [orders] The sort orders of `iteratees`.
* @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
* @returns {Array} Returns the new sorted array.
* @example
*
* var users = [
* { 'user': 'fred', 'age': 48 },
* { 'user': 'barney', 'age': 34 },
* { 'user': 'fred', 'age': 40 },
* { 'user': 'barney', 'age': 36 }
* ];
*
* // Sort by `user` in ascending order and by `age` in descending order.
* _.orderBy(users, ['user', 'age'], ['asc', 'desc']);
* // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
*/
function orderBy(collection, iteratees, orders, guard) {
if (collection == null) {
return [];
}
if (!isArray(iteratees)) {
iteratees = iteratees == null ? [] : [iteratees];
}
orders = guard ? undefined : orders;
if (!isArray(orders)) {
orders = orders == null ? [] : [orders];
}
return baseOrderBy(collection, iteratees, orders);
}
/**
* Creates an array of elements split into two groups, the first of which
* contains elements `predicate` returns truthy for, the second of which
* contains elements `predicate` returns falsey for. The predicate is
* invoked with one argument: (value).
*
* @static
* @memberOf _
* @since 3.0.0
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} [predicate=_.identity] The function invoked per iteration.
* @returns {Array} Returns the array of grouped elements.
* @example
*
* var users = [
* { 'user': 'barney', 'age': 36, 'active': false },
* { 'user': 'fred', 'age': 40, 'active': true },
* { 'user': 'pebbles', 'age': 1, 'active': false }
* ];
*
* _.partition(users, function(o) { return o.active; });
* // => objects for [['fred'], ['barney', 'pebbles']]
*
* // The `_.matches` iteratee shorthand.
* _.partition(users, { 'age': 1, 'active': false });
* // => objects for [['pebbles'], ['barney', 'fred']]
*
* // The `_.matchesProperty` iteratee shorthand.
* _.partition(users, ['active', false]);
* // => objects for [['barney', 'pebbles'], ['fred']]
*
* // The `_.property` iteratee shorthand.
* _.partition(users, 'active');
* // => objects for [['fred'], ['barney', 'pebbles']]
*/
var partition = createAggregator(function(result, value, key) {
result[key ? 0 : 1].push(value);
}, function() { return [[], []]; });
/**
* Reduces `collection` to a value which is the accumulated result of running
* each element in `collection` thru `iteratee`, where each successive
* invocation is supplied the return value of the previous. If `accumulator`
* is not given, the first element of `collection` is used as the initial
* value. The iteratee is invoked with four arguments:
* (accumulator, value, index|key, collection).
*
* Many lodash methods are guarded to work as iteratees for methods like
* `_.reduce`, `_.reduceRight`, and `_.transform`.
*
* The guarded methods are:
* `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `orderBy`,
* and `sortBy`
*
* @static
* @memberOf _
* @since 0.1.0
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @param {*} [accumulator] The initial value.
* @returns {*} Returns the accumulated value.
* @see _.reduceRight
* @example
*
* _.reduce([1, 2], function(sum, n) {
* return sum + n;
* }, 0);
* // => 3
*
* _.reduce({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
* (result[value] || (result[value] = [])).push(key);
* return result;
* }, {});
* // => { '1': ['a', 'c'], '2': ['b'] } (iteration order is not guaranteed)
*/
function reduce(collection, iteratee, accumulator) {
var func = isArray(collection) ? arrayReduce : baseReduce,
initAccum = arguments.length < 3;
return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEach);
}
/**
* This method is like `_.reduce` except that it iterates over elements of
* `collection` from right to left.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @param {*} [accumulator] The initial value.
* @returns {*} Returns the accumulated value.
* @see _.reduce
* @example
*
* var array = [[0, 1], [2, 3], [4, 5]];
*
* _.reduceRight(array, function(flattened, other) {
* return flattened.concat(other);
* }, []);
* // => [4, 5, 2, 3, 0, 1]
*/
function reduceRight(collection, iteratee, accumulator) {
var func = isArray(collection) ? arrayReduceRight : baseReduce,
initAccum = arguments.length < 3;
return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEachRight);
}
/**
* The opposite of `_.filter`; this method returns the elements of `collection`
* that `predicate` does **not** return truthy for.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} [predicate=_.identity] The function invoked per iteration.
* @returns {Array} Returns the new filtered array.
* @see _.filter
* @example
*
* var users = [
* { 'user': 'barney', 'age': 36, 'active': false },
* { 'user': 'fred', 'age': 40, 'active': true }
* ];
*
* _.reject(users, function(o) { return !o.active; });
* // => objects for ['fred']
*
* // The `_.matches` iteratee shorthand.
* _.reject(users, { 'age': 40, 'active': true });
* // => objects for ['barney']
*
* // The `_.matchesProperty` iteratee shorthand.
* _.reject(users, ['active', false]);
* // => objects for ['fred']
*
* // The `_.property` iteratee shorthand.
* _.reject(users, 'active');
* // => objects for ['barney']
*/
function reject(collection, predicate) {
var func = isArray(collection) ? arrayFilter : baseFilter;
return func(collection, negate(getIteratee(predicate, 3)));
}
/**
* Gets a random element from `collection`.
*
* @static
* @memberOf _
* @since 2.0.0
* @category Collection
* @param {Array|Object} collection The collection to sample.
* @returns {*} Returns the random element.
* @example
*
* _.sample([1, 2, 3, 4]);
* // => 2
*/
function sample(collection) {
var func = isArray(collection) ? arraySample : baseSample;
return func(collection);
}
/**
* Gets `n` random elements at unique keys from `collection` up to the
* size of `collection`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Collection
* @param {Array|Object} collection The collection to sample.
* @param {number} [n=1] The number of elements to sample.
* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
* @returns {Array} Returns the random elements.
* @example
*
* _.sampleSize([1, 2, 3], 2);
* // => [3, 1]
*
* _.sampleSize([1, 2, 3], 4);
* // => [2, 3, 1]
*/
function sampleSize(collection, n, guard) {
if ((guard ? isIterateeCall(collection, n, guard) : n === undefined)) {
n = 1;
} else {
n = toInteger(n);
}
var func = isArray(collection) ? arraySampleSize : baseSampleSize;
return func(collection, n);
}
/**
* Creates an array of shuffled values, using a version of the
* [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher-Yates_shuffle).
*
* @static
* @memberOf _
* @since 0.1.0
* @category Collection
* @param {Array|Object} collection The collection to shuffle.
* @returns {Array} Returns the new shuffled array.
* @example
*
* _.shuffle([1, 2, 3, 4]);
* // => [4, 1, 3, 2]
*/
function shuffle(collection) {
var func = isArray(collection) ? arrayShuffle : baseShuffle;
return func(collection);
}
/**
* Gets the size of `collection` by returning its length for array-like
* values or the number of own enumerable string keyed properties for objects.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Collection
* @param {Array|Object|string} collection The collection to inspect.
* @returns {number} Returns the collection size.
* @example
*
* _.size([1, 2, 3]);
* // => 3
*
* _.size({ 'a': 1, 'b': 2 });
* // => 2
*
* _.size('pebbles');
* // => 7
*/
function size(collection) {
if (collection == null) {
return 0;
}
if (isArrayLike(collection)) {
return isString(collection) ? stringSize(collection) : collection.length;
}
var tag = getTag(collection);
if (tag == mapTag || tag == setTag) {
return collection.size;
}
return baseKeys(collection).length;
}
/**
* Checks if `predicate` returns truthy for **any** element of `collection`.
* Iteration is stopped once `predicate` returns truthy. The predicate is
* invoked with three arguments: (value, index|key, collection).
*
* @static
* @memberOf _
* @since 0.1.0
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} [predicate=_.identity] The function invoked per iteration.
* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
* @returns {boolean} Returns `true` if any element passes the predicate check,
* else `false`.
* @example
*
* _.some([null, 0, 'yes', false], Boolean);
* // => true
*
* var users = [
* { 'user': 'barney', 'active': true },
* { 'user': 'fred', 'active': false }
* ];
*
* // The `_.matches` iteratee shorthand.
* _.some(users, { 'user': 'barney', 'active': false });
* // => false
*
* // The `_.matchesProperty` iteratee shorthand.
* _.some(users, ['active', false]);
* // => true
*
* // The `_.property` iteratee shorthand.
* _.some(users, 'active');
* // => true
*/
function some(collection, predicate, guard) {
var func = isArray(collection) ? arraySome : baseSome;
if (guard && isIterateeCall(collection, predicate, guard)) {
predicate = undefined;
}
return func(collection, getIteratee(predicate, 3));
}
/**
* Creates an array of elements, sorted in ascending order by the results of
* running each element in a collection thru each iteratee. This method
* performs a stable sort, that is, it preserves the original sort order of
* equal elements. The iteratees are invoked with one argument: (value).
*
* @static
* @memberOf _
* @since 0.1.0
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {...(Function|Function[])} [iteratees=[_.identity]]
* The iteratees to sort by.
* @returns {Array} Returns the new sorted array.
* @example
*
* var users = [
* { 'user': 'fred', 'age': 48 },
* { 'user': 'barney', 'age': 36 },
* { 'user': 'fred', 'age': 40 },
* { 'user': 'barney', 'age': 34 }
* ];
*
* _.sortBy(users, [function(o) { return o.user; }]);
* // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
*
* _.sortBy(users, ['user', 'age']);
* // => objects for [['barney', 34], ['barney', 36], ['fred', 40], ['fred', 48]]
*/
var sortBy = baseRest(function(collection, iteratees) {
if (collection == null) {
return [];
}
var length = iteratees.length;
if (length > 1 && isIterateeCall(collection, iteratees[0], iteratees[1])) {
iteratees = [];
} else if (length > 2 && isIterateeCall(iteratees[0], iteratees[1], iteratees[2])) {
iteratees = [iteratees[0]];
}
return baseOrderBy(collection, baseFlatten(iteratees, 1), []);
});
/*------------------------------------------------------------------------*/
/**
* Gets the timestamp of the number of milliseconds that have elapsed since
* the Unix epoch (1 January 1970 00:00:00 UTC).
*
* @static
* @memberOf _
* @since 2.4.0
* @category Date
* @returns {number} Returns the timestamp.
* @example
*
* _.defer(function(stamp) {
* console.log(_.now() - stamp);
* }, _.now());
* // => Logs the number of milliseconds it took for the deferred invocation.
*/
var now = ctxNow || function() {
return root.Date.now();
};
/*------------------------------------------------------------------------*/
/**
* The opposite of `_.before`; this method creates a function that invokes
* `func` once it's called `n` or more times.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Function
* @param {number} n The number of calls before `func` is invoked.
* @param {Function} func The function to restrict.
* @returns {Function} Returns the new restricted function.
* @example
*
* var saves = ['profile', 'settings'];
*
* var done = _.after(saves.length, function() {
* console.log('done saving!');
* });
*
* _.forEach(saves, function(type) {
* asyncSave({ 'type': type, 'complete': done });
* });
* // => Logs 'done saving!' after the two async saves have completed.
*/
function after(n, func) {
if (typeof func != 'function') {
throw new TypeError(FUNC_ERROR_TEXT);
}
n = toInteger(n);
return function() {
if (--n < 1) {
return func.apply(this, arguments);
}
};
}
/**
* Creates a function that invokes `func`, with up to `n` arguments,
* ignoring any additional arguments.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Function
* @param {Function} func The function to cap arguments for.
* @param {number} [n=func.length] The arity cap.
* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
* @returns {Function} Returns the new capped function.
* @example
*
* _.map(['6', '8', '10'], _.ary(parseInt, 1));
* // => [6, 8, 10]
*/
function ary(func, n, guard) {
n = guard ? undefined : n;
n = (func && n == null) ? func.length : n;
return createWrap(func, ARY_FLAG, undefined, undefined, undefined, undefined, n);
}
/**
* Creates a function that invokes `func`, with the `this` binding and arguments
* of the created function, while it's called less than `n` times. Subsequent
* calls to the created function return the result of the last `func` invocation.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Function
* @param {number} n The number of calls at which `func` is no longer invoked.
* @param {Function} func The function to restrict.
* @returns {Function} Returns the new restricted function.
* @example
*
* jQuery(element).on('click', _.before(5, addContactToList));
* // => Allows adding up to 4 contacts to the list.
*/
function before(n, func) {
var result;
if (typeof func != 'function') {
throw new TypeError(FUNC_ERROR_TEXT);
}
n = toInteger(n);
return function() {
if (--n > 0) {
result = func.apply(this, arguments);
}
if (n <= 1) {
func = undefined;
}
return result;
};
}
/**
* Creates a function that invokes `func` with the `this` binding of `thisArg`
* and `partials` prepended to the arguments it receives.
*
* The `_.bind.placeholder` value, which defaults to `_` in monolithic builds,
* may be used as a placeholder for partially applied arguments.
*
* **Note:** Unlike native `Function#bind`, this method doesn't set the "length"
* property of bound functions.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Function
* @param {Function} func The function to bind.
* @param {*} thisArg The `this` binding of `func`.
* @param {...*} [partials] The arguments to be partially applied.
* @returns {Function} Returns the new bound function.
* @example
*
* function greet(greeting, punctuation) {
* return greeting + ' ' + this.user + punctuation;
* }
*
* var object = { 'user': 'fred' };
*
* var bound = _.bind(greet, object, 'hi');
* bound('!');
* // => 'hi fred!'
*
* // Bound with placeholders.
* var bound = _.bind(greet, object, _, '!');
* bound('hi');
* // => 'hi fred!'
*/
var bind = baseRest(function(func, thisArg, partials) {
var bitmask = BIND_FLAG;
if (partials.length) {
var holders = replaceHolders(partials, getHolder(bind));
bitmask |= PARTIAL_FLAG;
}
return createWrap(func, bitmask, thisArg, partials, holders);
});
/**
* Creates a function that invokes the method at `object[key]` with `partials`
* prepended to the arguments it receives.
*
* This method differs from `_.bind` by allowing bound functions to reference
* methods that may be redefined or don't yet exist. See
* [Peter Michaux's article](http://peter.michaux.ca/articles/lazy-function-definition-pattern)
* for more details.
*
* The `_.bindKey.placeholder` value, which defaults to `_` in monolithic
* builds, may be used as a placeholder for partially applied arguments.
*
* @static
* @memberOf _
* @since 0.10.0
* @category Function
* @param {Object} object The object to invoke the method on.
* @param {string} key The key of the method.
* @param {...*} [partials] The arguments to be partially applied.
* @returns {Function} Returns the new bound function.
* @example
*
* var object = {
* 'user': 'fred',
* 'greet': function(greeting, punctuation) {
* return greeting + ' ' + this.user + punctuation;
* }
* };
*
* var bound = _.bindKey(object, 'greet', 'hi');
* bound('!');
* // => 'hi fred!'
*
* object.greet = function(greeting, punctuation) {
* return greeting + 'ya ' + this.user + punctuation;
* };
*
* bound('!');
* // => 'hiya fred!'
*
* // Bound with placeholders.
* var bound = _.bindKey(object, 'greet', _, '!');
* bound('hi');
* // => 'hiya fred!'
*/
var bindKey = baseRest(function(object, key, partials) {
var bitmask = BIND_FLAG | BIND_KEY_FLAG;
if (partials.length) {
var holders = replaceHolders(partials, getHolder(bindKey));
bitmask |= PARTIAL_FLAG;
}
return createWrap(key, bitmask, object, partials, holders);
});
/**
* Creates a function that accepts arguments of `func` and either invokes
* `func` returning its result, if at least `arity` number of arguments have
* been provided, or returns a function that accepts the remaining `func`
* arguments, and so on. The arity of `func` may be specified if `func.length`
* is not sufficient.
*
* The `_.curry.placeholder` value, which defaults to `_` in monolithic builds,
* may be used as a placeholder for provided arguments.
*
* **Note:** This method doesn't set the "length" property of curried functions.
*
* @static
* @memberOf _
* @since 2.0.0
* @category Function
* @param {Function} func The function to curry.
* @param {number} [arity=func.length] The arity of `func`.
* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
* @returns {Function} Returns the new curried function.
* @example
*
* var abc = function(a, b, c) {
* return [a, b, c];
* };
*
* var curried = _.curry(abc);
*
* curried(1)(2)(3);
* // => [1, 2, 3]
*
* curried(1, 2)(3);
* // => [1, 2, 3]
*
* curried(1, 2, 3);
* // => [1, 2, 3]
*
* // Curried with placeholders.
* curried(1)(_, 3)(2);
* // => [1, 2, 3]
*/
function curry(func, arity, guard) {
arity = guard ? undefined : arity;
var result = createWrap(func, CURRY_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
result.placeholder = curry.placeholder;
return result;
}
/**
* This method is like `_.curry` except that arguments are applied to `func`
* in the manner of `_.partialRight` instead of `_.partial`.
*
* The `_.curryRight.placeholder` value, which defaults to `_` in monolithic
* builds, may be used as a placeholder for provided arguments.
*
* **Note:** This method doesn't set the "length" property of curried functions.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Function
* @param {Function} func The function to curry.
* @param {number} [arity=func.length] The arity of `func`.
* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
* @returns {Function} Returns the new curried function.
* @example
*
* var abc = function(a, b, c) {
* return [a, b, c];
* };
*
* var curried = _.curryRight(abc);
*
* curried(3)(2)(1);
* // => [1, 2, 3]
*
* curried(2, 3)(1);
* // => [1, 2, 3]
*
* curried(1, 2, 3);
* // => [1, 2, 3]
*
* // Curried with placeholders.
* curried(3)(1, _)(2);
* // => [1, 2, 3]
*/
function curryRight(func, arity, guard) {
arity = guard ? undefined : arity;
var result = createWrap(func, CURRY_RIGHT_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
result.placeholder = curryRight.placeholder;
return result;
}
/**
* Creates a debounced function that delays invoking `func` until after `wait`
* milliseconds have elapsed since the last time the debounced function was
* invoked. The debounced function comes with a `cancel` method to cancel
* delayed `func` invocations and a `flush` method to immediately invoke them.
* Provide `options` to indicate whether `func` should be invoked on the
* leading and/or trailing edge of the `wait` timeout. The `func` is invoked
* with the last arguments provided to the debounced function. Subsequent
* calls to the debounced function return the result of the last `func`
* invocation.
*
* **Note:** If `leading` and `trailing` options are `true`, `func` is
* invoked on the trailing edge of the timeout only if the debounced function
* is invoked more than once during the `wait` timeout.
*
* If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
* until to the next tick, similar to `setTimeout` with a timeout of `0`.
*
* See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
* for details over the differences between `_.debounce` and `_.throttle`.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Function
* @param {Function} func The function to debounce.
* @param {number} [wait=0] The number of milliseconds to delay.
* @param {Object} [options={}] The options object.
* @param {boolean} [options.leading=false]
* Specify invoking on the leading edge of the timeout.
* @param {number} [options.maxWait]
* The maximum time `func` is allowed to be delayed before it's invoked.
* @param {boolean} [options.trailing=true]
* Specify invoking on the trailing edge of the timeout.
* @returns {Function} Returns the new debounced function.
* @example
*
* // Avoid costly calculations while the window size is in flux.
* jQuery(window).on('resize', _.debounce(calculateLayout, 150));
*
* // Invoke `sendMail` when clicked, debouncing subsequent calls.
* jQuery(element).on('click', _.debounce(sendMail, 300, {
* 'leading': true,
* 'trailing': false
* }));
*
* // Ensure `batchLog` is invoked once after 1 second of debounced calls.
* var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
* var source = new EventSource('/stream');
* jQuery(source).on('message', debounced);
*
* // Cancel the trailing debounced invocation.
* jQuery(window).on('popstate', debounced.cancel);
*/
function debounce(func, wait, options) {
var lastArgs,
lastThis,
maxWait,
result,
timerId,
lastCallTime,
lastInvokeTime = 0,
leading = false,
maxing = false,
trailing = true;
if (typeof func != 'function') {
throw new TypeError(FUNC_ERROR_TEXT);
}
wait = toNumber(wait) || 0;
if (isObject(options)) {
leading = !!options.leading;
maxing = 'maxWait' in options;
maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
trailing = 'trailing' in options ? !!options.trailing : trailing;
}
function invokeFunc(time) {
var args = lastArgs,
thisArg = lastThis;
lastArgs = lastThis = undefined;
lastInvokeTime = time;
result = func.apply(thisArg, args);
return result;
}
function leadingEdge(time) {
// Reset any `maxWait` timer.
lastInvokeTime = time;
// Start the timer for the trailing edge.
timerId = setTimeout(timerExpired, wait);
// Invoke the leading edge.
return leading ? invokeFunc(time) : result;
}
function remainingWait(time) {
var timeSinceLastCall = time - lastCallTime,
timeSinceLastInvoke = time - lastInvokeTime,
result = wait - timeSinceLastCall;
return maxing ? nativeMin(result, maxWait - timeSinceLastInvoke) : result;
}
function shouldInvoke(time) {
var timeSinceLastCall = time - lastCallTime,
timeSinceLastInvoke = time - lastInvokeTime;
// Either this is the first call, activity has stopped and we're at the
// trailing edge, the system time has gone backwards and we're treating
// it as the trailing edge, or we've hit the `maxWait` limit.
return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||
(timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));
}
function timerExpired() {
var time = now();
if (shouldInvoke(time)) {
return trailingEdge(time);
}
// Restart the timer.
timerId = setTimeout(timerExpired, remainingWait(time));
}
function trailingEdge(time) {
timerId = undefined;
// Only invoke if we have `lastArgs` which means `func` has been
// debounced at least once.
if (trailing && lastArgs) {
return invokeFunc(time);
}
lastArgs = lastThis = undefined;
return result;
}
function cancel() {
if (timerId !== undefined) {
clearTimeout(timerId);
}
lastInvokeTime = 0;
lastArgs = lastCallTime = lastThis = timerId = undefined;
}
function flush() {
return timerId === undefined ? result : trailingEdge(now());
}
function debounced() {
var time = now(),
isInvoking = shouldInvoke(time);
lastArgs = arguments;
lastThis = this;
lastCallTime = time;
if (isInvoking) {
if (timerId === undefined) {
return leadingEdge(lastCallTime);
}
if (maxing) {
// Handle invocations in a tight loop.
timerId = setTimeout(timerExpired, wait);
return invokeFunc(lastCallTime);
}
}
if (timerId === undefined) {
timerId = setTimeout(timerExpired, wait);
}
return result;
}
debounced.cancel = cancel;
debounced.flush = flush;
return debounced;
}
/**
* Defers invoking the `func` until the current call stack has cleared. Any
* additional arguments are provided to `func` when it's invoked.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Function
* @param {Function} func The function to defer.
* @param {...*} [args] The arguments to invoke `func` with.
* @returns {number} Returns the timer id.
* @example
*
* _.defer(function(text) {
* console.log(text);
* }, 'deferred');
* // => Logs 'deferred' after one millisecond.
*/
var defer = baseRest(function(func, args) {
return baseDelay(func, 1, args);
});
/**
* Invokes `func` after `wait` milliseconds. Any additional arguments are
* provided to `func` when it's invoked.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Function
* @param {Function} func The function to delay.
* @param {number} wait The number of milliseconds to delay invocation.
* @param {...*} [args] The arguments to invoke `func` with.
* @returns {number} Returns the timer id.
* @example
*
* _.delay(function(text) {
* console.log(text);
* }, 1000, 'later');
* // => Logs 'later' after one second.
*/
var delay = baseRest(function(func, wait, args) {
return baseDelay(func, toNumber(wait) || 0, args);
});
/**
* Creates a function that invokes `func` with arguments reversed.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Function
* @param {Function} func The function to flip arguments for.
* @returns {Function} Returns the new flipped function.
* @example
*
* var flipped = _.flip(function() {
* return _.toArray(arguments);
* });
*
* flipped('a', 'b', 'c', 'd');
* // => ['d', 'c', 'b', 'a']
*/
function flip(func) {
return createWrap(func, FLIP_FLAG);
}
/**
* Creates a function that memoizes the result of `func`. If `resolver` is
* provided, it determines the cache key for storing the result based on the
* arguments provided to the memoized function. By default, the first argument
* provided to the memoized function is used as the map cache key. The `func`
* is invoked with the `this` binding of the memoized function.
*
* **Note:** The cache is exposed as the `cache` property on the memoized
* function. Its creation may be customized by replacing the `_.memoize.Cache`
* constructor with one whose instances implement the
* [`Map`](http://ecma-international.org/ecma-262/7.0/#sec-properties-of-the-map-prototype-object)
* method interface of `clear`, `delete`, `get`, `has`, and `set`.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Function
* @param {Function} func The function to have its output memoized.
* @param {Function} [resolver] The function to resolve the cache key.
* @returns {Function} Returns the new memoized function.
* @example
*
* var object = { 'a': 1, 'b': 2 };
* var other = { 'c': 3, 'd': 4 };
*
* var values = _.memoize(_.values);
* values(object);
* // => [1, 2]
*
* values(other);
* // => [3, 4]
*
* object.a = 2;
* values(object);
* // => [1, 2]
*
* // Modify the result cache.
* values.cache.set(object, ['a', 'b']);
* values(object);
* // => ['a', 'b']
*
* // Replace `_.memoize.Cache`.
* _.memoize.Cache = WeakMap;
*/
function memoize(func, resolver) {
if (typeof func != 'function' || (resolver != null && typeof resolver != 'function')) {
throw new TypeError(FUNC_ERROR_TEXT);
}
var memoized = function() {
var args = arguments,
key = resolver ? resolver.apply(this, args) : args[0],
cache = memoized.cache;
if (cache.has(key)) {
return cache.get(key);
}
var result = func.apply(this, args);
memoized.cache = cache.set(key, result) || cache;
return result;
};
memoized.cache = new (memoize.Cache || MapCache);
return memoized;
}
// Expose `MapCache`.
memoize.Cache = MapCache;
/**
* Creates a function that negates the result of the predicate `func`. The
* `func` predicate is invoked with the `this` binding and arguments of the
* created function.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Function
* @param {Function} predicate The predicate to negate.
* @returns {Function} Returns the new negated function.
* @example
*
* function isEven(n) {
* return n % 2 == 0;
* }
*
* _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));
* // => [1, 3, 5]
*/
function negate(predicate) {
if (typeof predicate != 'function') {
throw new TypeError(FUNC_ERROR_TEXT);
}
return function() {
var args = arguments;
switch (args.length) {
case 0: return !predicate.call(this);
case 1: return !predicate.call(this, args[0]);
case 2: return !predicate.call(this, args[0], args[1]);
case 3: return !predicate.call(this, args[0], args[1], args[2]);
}
return !predicate.apply(this, args);
};
}
/**
* Creates a function that is restricted to invoking `func` once. Repeat calls
* to the function return the value of the first invocation. The `func` is
* invoked with the `this` binding and arguments of the created function.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Function
* @param {Function} func The function to restrict.
* @returns {Function} Returns the new restricted function.
* @example
*
* var initialize = _.once(createApplication);
* initialize();
* initialize();
* // => `createApplication` is invoked once
*/
function once(func) {
return before(2, func);
}
/**
* Creates a function that invokes `func` with its arguments transformed.
*
* @static
* @since 4.0.0
* @memberOf _
* @category Function
* @param {Function} func The function to wrap.
* @param {...(Function|Function[])} [transforms=[_.identity]]
* The argument transforms.
* @returns {Function} Returns the new function.
* @example
*
* function doubled(n) {
* return n * 2;
* }
*
* function square(n) {
* return n * n;
* }
*
* var func = _.overArgs(function(x, y) {
* return [x, y];
* }, [square, doubled]);
*
* func(9, 3);
* // => [81, 6]
*
* func(10, 5);
* // => [100, 10]
*/
var overArgs = castRest(function(func, transforms) {
transforms = (transforms.length == 1 && isArray(transforms[0]))
? arrayMap(transforms[0], baseUnary(getIteratee()))
: arrayMap(baseFlatten(transforms, 1), baseUnary(getIteratee()));
var funcsLength = transforms.length;
return baseRest(function(args) {
var index = -1,
length = nativeMin(args.length, funcsLength);
while (++index < length) {
args[index] = transforms[index].call(this, args[index]);
}
return apply(func, this, args);
});
});
/**
* Creates a function that invokes `func` with `partials` prepended to the
* arguments it receives. This method is like `_.bind` except it does **not**
* alter the `this` binding.
*
* The `_.partial.placeholder` value, which defaults to `_` in monolithic
* builds, may be used as a placeholder for partially applied arguments.
*
* **Note:** This method doesn't set the "length" property of partially
* applied functions.
*
* @static
* @memberOf _
* @since 0.2.0
* @category Function
* @param {Function} func The function to partially apply arguments to.
* @param {...*} [partials] The arguments to be partially applied.
* @returns {Function} Returns the new partially applied function.
* @example
*
* function greet(greeting, name) {
* return greeting + ' ' + name;
* }
*
* var sayHelloTo = _.partial(greet, 'hello');
* sayHelloTo('fred');
* // => 'hello fred'
*
* // Partially applied with placeholders.
* var greetFred = _.partial(greet, _, 'fred');
* greetFred('hi');
* // => 'hi fred'
*/
var partial = baseRest(function(func, partials) {
var holders = replaceHolders(partials, getHolder(partial));
return createWrap(func, PARTIAL_FLAG, undefined, partials, holders);
});
/**
* This method is like `_.partial` except that partially applied arguments
* are appended to the arguments it receives.
*
* The `_.partialRight.placeholder` value, which defaults to `_` in monolithic
* builds, may be used as a placeholder for partially applied arguments.
*
* **Note:** This method doesn't set the "length" property of partially
* applied functions.
*
* @static
* @memberOf _
* @since 1.0.0
* @category Function
* @param {Function} func The function to partially apply arguments to.
* @param {...*} [partials] The arguments to be partially applied.
* @returns {Function} Returns the new partially applied function.
* @example
*
* function greet(greeting, name) {
* return greeting + ' ' + name;
* }
*
* var greetFred = _.partialRight(greet, 'fred');
* greetFred('hi');
* // => 'hi fred'
*
* // Partially applied with placeholders.
* var sayHelloTo = _.partialRight(greet, 'hello', _);
* sayHelloTo('fred');
* // => 'hello fred'
*/
var partialRight = baseRest(function(func, partials) {
var holders = replaceHolders(partials, getHolder(partialRight));
return createWrap(func, PARTIAL_RIGHT_FLAG, undefined, partials, holders);
});
/**
* Creates a function that invokes `func` with arguments arranged according
* to the specified `indexes` where the argument value at the first index is
* provided as the first argument, the argument value at the second index is
* provided as the second argument, and so on.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Function
* @param {Function} func The function to rearrange arguments for.
* @param {...(number|number[])} indexes The arranged argument indexes.
* @returns {Function} Returns the new function.
* @example
*
* var rearged = _.rearg(function(a, b, c) {
* return [a, b, c];
* }, [2, 0, 1]);
*
* rearged('b', 'c', 'a')
* // => ['a', 'b', 'c']
*/
var rearg = flatRest(function(func, indexes) {
return createWrap(func, REARG_FLAG, undefined, undefined, undefined, indexes);
});
/**
* Creates a function that invokes `func` with the `this` binding of the
* created function and arguments from `start` and beyond provided as
* an array.
*
* **Note:** This method is based on the
* [rest parameter](https://mdn.io/rest_parameters).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Function
* @param {Function} func The function to apply a rest parameter to.
* @param {number} [start=func.length-1] The start position of the rest parameter.
* @returns {Function} Returns the new function.
* @example
*
* var say = _.rest(function(what, names) {
* return what + ' ' + _.initial(names).join(', ') +
* (_.size(names) > 1 ? ', & ' : '') + _.last(names);
* });
*
* say('hello', 'fred', 'barney', 'pebbles');
* // => 'hello fred, barney, & pebbles'
*/
function rest(func, start) {
if (typeof func != 'function') {
throw new TypeError(FUNC_ERROR_TEXT);
}
start = start === undefined ? start : toInteger(start);
return baseRest(func, start);
}
/**
* Creates a function that invokes `func` with the `this` binding of the
* create function and an array of arguments much like
* [`Function#apply`](http://www.ecma-international.org/ecma-262/7.0/#sec-function.prototype.apply).
*
* **Note:** This method is based on the
* [spread operator](https://mdn.io/spread_operator).
*
* @static
* @memberOf _
* @since 3.2.0
* @category Function
* @param {Function} func The function to spread arguments over.
* @param {number} [start=0] The start position of the spread.
* @returns {Function} Returns the new function.
* @example
*
* var say = _.spread(function(who, what) {
* return who + ' says ' + what;
* });
*
* say(['fred', 'hello']);
* // => 'fred says hello'
*
* var numbers = Promise.all([
* Promise.resolve(40),
* Promise.resolve(36)
* ]);
*
* numbers.then(_.spread(function(x, y) {
* return x + y;
* }));
* // => a Promise of 76
*/
function spread(func, start) {
if (typeof func != 'function') {
throw new TypeError(FUNC_ERROR_TEXT);
}
start = start === undefined ? 0 : nativeMax(toInteger(start), 0);
return baseRest(function(args) {
var array = args[start],
otherArgs = castSlice(args, 0, start);
if (array) {
arrayPush(otherArgs, array);
}
return apply(func, this, otherArgs);
});
}
/**
* Creates a throttled function that only invokes `func` at most once per
* every `wait` milliseconds. The throttled function comes with a `cancel`
* method to cancel delayed `func` invocations and a `flush` method to
* immediately invoke them. Provide `options` to indicate whether `func`
* should be invoked on the leading and/or trailing edge of the `wait`
* timeout. The `func` is invoked with the last arguments provided to the
* throttled function. Subsequent calls to the throttled function return the
* result of the last `func` invocation.
*
* **Note:** If `leading` and `trailing` options are `true`, `func` is
* invoked on the trailing edge of the timeout only if the throttled function
* is invoked more than once during the `wait` timeout.
*
* If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
* until to the next tick, similar to `setTimeout` with a timeout of `0`.
*
* See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
* for details over the differences between `_.throttle` and `_.debounce`.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Function
* @param {Function} func The function to throttle.
* @param {number} [wait=0] The number of milliseconds to throttle invocations to.
* @param {Object} [options={}] The options object.
* @param {boolean} [options.leading=true]
* Specify invoking on the leading edge of the timeout.
* @param {boolean} [options.trailing=true]
* Specify invoking on the trailing edge of the timeout.
* @returns {Function} Returns the new throttled function.
* @example
*
* // Avoid excessively updating the position while scrolling.
* jQuery(window).on('scroll', _.throttle(updatePosition, 100));
*
* // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
* var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
* jQuery(element).on('click', throttled);
*
* // Cancel the trailing throttled invocation.
* jQuery(window).on('popstate', throttled.cancel);
*/
function throttle(func, wait, options) {
var leading = true,
trailing = true;
if (typeof func != 'function') {
throw new TypeError(FUNC_ERROR_TEXT);
}
if (isObject(options)) {
leading = 'leading' in options ? !!options.leading : leading;
trailing = 'trailing' in options ? !!options.trailing : trailing;
}
return debounce(func, wait, {
'leading': leading,
'maxWait': wait,
'trailing': trailing
});
}
/**
* Creates a function that accepts up to one argument, ignoring any
* additional arguments.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Function
* @param {Function} func The function to cap arguments for.
* @returns {Function} Returns the new capped function.
* @example
*
* _.map(['6', '8', '10'], _.unary(parseInt));
* // => [6, 8, 10]
*/
function unary(func) {
return ary(func, 1);
}
/**
* Creates a function that provides `value` to `wrapper` as its first
* argument. Any additional arguments provided to the function are appended
* to those provided to the `wrapper`. The wrapper is invoked with the `this`
* binding of the created function.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Function
* @param {*} value The value to wrap.
* @param {Function} [wrapper=identity] The wrapper function.
* @returns {Function} Returns the new function.
* @example
*
* var p = _.wrap(_.escape, function(func, text) {
* return '<p>' + func(text) + '</p>';
* });
*
* p('fred, barney, & pebbles');
* // => '<p>fred, barney, &amp; pebbles</p>'
*/
function wrap(value, wrapper) {
return partial(castFunction(wrapper), value);
}
/*------------------------------------------------------------------------*/
/**
* Casts `value` as an array if it's not one.
*
* @static
* @memberOf _
* @since 4.4.0
* @category Lang
* @param {*} value The value to inspect.
* @returns {Array} Returns the cast array.
* @example
*
* _.castArray(1);
* // => [1]
*
* _.castArray({ 'a': 1 });
* // => [{ 'a': 1 }]
*
* _.castArray('abc');
* // => ['abc']
*
* _.castArray(null);
* // => [null]
*
* _.castArray(undefined);
* // => [undefined]
*
* _.castArray();
* // => []
*
* var array = [1, 2, 3];
* console.log(_.castArray(array) === array);
* // => true
*/
function castArray() {
if (!arguments.length) {
return [];
}
var value = arguments[0];
return isArray(value) ? value : [value];
}
/**
* Creates a shallow clone of `value`.
*
* **Note:** This method is loosely based on the
* [structured clone algorithm](https://mdn.io/Structured_clone_algorithm)
* and supports cloning arrays, array buffers, booleans, date objects, maps,
* numbers, `Object` objects, regexes, sets, strings, symbols, and typed
* arrays. The own enumerable properties of `arguments` objects are cloned
* as plain objects. An empty object is returned for uncloneable values such
* as error objects, functions, DOM nodes, and WeakMaps.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to clone.
* @returns {*} Returns the cloned value.
* @see _.cloneDeep
* @example
*
* var objects = [{ 'a': 1 }, { 'b': 2 }];
*
* var shallow = _.clone(objects);
* console.log(shallow[0] === objects[0]);
* // => true
*/
function clone(value) {
return baseClone(value, false, true);
}
/**
* This method is like `_.clone` except that it accepts `customizer` which
* is invoked to produce the cloned value. If `customizer` returns `undefined`,
* cloning is handled by the method instead. The `customizer` is invoked with
* up to four arguments; (value [, index|key, object, stack]).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to clone.
* @param {Function} [customizer] The function to customize cloning.
* @returns {*} Returns the cloned value.
* @see _.cloneDeepWith
* @example
*
* function customizer(value) {
* if (_.isElement(value)) {
* return value.cloneNode(false);
* }
* }
*
* var el = _.cloneWith(document.body, customizer);
*
* console.log(el === document.body);
* // => false
* console.log(el.nodeName);
* // => 'BODY'
* console.log(el.childNodes.length);
* // => 0
*/
function cloneWith(value, customizer) {
customizer = typeof customizer == 'function' ? customizer : undefined;
return baseClone(value, false, true, customizer);
}
/**
* This method is like `_.clone` except that it recursively clones `value`.
*
* @static
* @memberOf _
* @since 1.0.0
* @category Lang
* @param {*} value The value to recursively clone.
* @returns {*} Returns the deep cloned value.
* @see _.clone
* @example
*
* var objects = [{ 'a': 1 }, { 'b': 2 }];
*
* var deep = _.cloneDeep(objects);
* console.log(deep[0] === objects[0]);
* // => false
*/
function cloneDeep(value) {
return baseClone(value, true, true);
}
/**
* This method is like `_.cloneWith` except that it recursively clones `value`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to recursively clone.
* @param {Function} [customizer] The function to customize cloning.
* @returns {*} Returns the deep cloned value.
* @see _.cloneWith
* @example
*
* function customizer(value) {
* if (_.isElement(value)) {
* return value.cloneNode(true);
* }
* }
*
* var el = _.cloneDeepWith(document.body, customizer);
*
* console.log(el === document.body);
* // => false
* console.log(el.nodeName);
* // => 'BODY'
* console.log(el.childNodes.length);
* // => 20
*/
function cloneDeepWith(value, customizer) {
customizer = typeof customizer == 'function' ? customizer : undefined;
return baseClone(value, true, true, customizer);
}
/**
* Checks if `object` conforms to `source` by invoking the predicate
* properties of `source` with the corresponding property values of `object`.
*
* **Note:** This method is equivalent to `_.conforms` when `source` is
* partially applied.
*
* @static
* @memberOf _
* @since 4.14.0
* @category Lang
* @param {Object} object The object to inspect.
* @param {Object} source The object of property predicates to conform to.
* @returns {boolean} Returns `true` if `object` conforms, else `false`.
* @example
*
* var object = { 'a': 1, 'b': 2 };
*
* _.conformsTo(object, { 'b': function(n) { return n > 1; } });
* // => true
*
* _.conformsTo(object, { 'b': function(n) { return n > 2; } });
* // => false
*/
function conformsTo(object, source) {
return source == null || baseConformsTo(object, source, keys(source));
}
/**
* Performs a
* [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
* comparison between two values to determine if they are equivalent.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to compare.
* @param {*} other The other value to compare.
* @returns {boolean} Returns `true` if the values are equivalent, else `false`.
* @example
*
* var object = { 'a': 1 };
* var other = { 'a': 1 };
*
* _.eq(object, object);
* // => true
*
* _.eq(object, other);
* // => false
*
* _.eq('a', 'a');
* // => true
*
* _.eq('a', Object('a'));
* // => false
*
* _.eq(NaN, NaN);
* // => true
*/
function eq(value, other) {
return value === other || (value !== value && other !== other);
}
/**
* Checks if `value` is greater than `other`.
*
* @static
* @memberOf _
* @since 3.9.0
* @category Lang
* @param {*} value The value to compare.
* @param {*} other The other value to compare.
* @returns {boolean} Returns `true` if `value` is greater than `other`,
* else `false`.
* @see _.lt
* @example
*
* _.gt(3, 1);
* // => true
*
* _.gt(3, 3);
* // => false
*
* _.gt(1, 3);
* // => false
*/
var gt = createRelationalOperation(baseGt);
/**
* Checks if `value` is greater than or equal to `other`.
*
* @static
* @memberOf _
* @since 3.9.0
* @category Lang
* @param {*} value The value to compare.
* @param {*} other The other value to compare.
* @returns {boolean} Returns `true` if `value` is greater than or equal to
* `other`, else `false`.
* @see _.lte
* @example
*
* _.gte(3, 1);
* // => true
*
* _.gte(3, 3);
* // => true
*
* _.gte(1, 3);
* // => false
*/
var gte = createRelationalOperation(function(value, other) {
return value >= other;
});
/**
* Checks if `value` is likely an `arguments` object.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an `arguments` object,
* else `false`.
* @example
*
* _.isArguments(function() { return arguments; }());
* // => true
*
* _.isArguments([1, 2, 3]);
* // => false
*/
var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {
return isObjectLike(value) && hasOwnProperty.call(value, 'callee') &&
!propertyIsEnumerable.call(value, 'callee');
};
/**
* Checks if `value` is classified as an `Array` object.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an array, else `false`.
* @example
*
* _.isArray([1, 2, 3]);
* // => true
*
* _.isArray(document.body.children);
* // => false
*
* _.isArray('abc');
* // => false
*
* _.isArray(_.noop);
* // => false
*/
var isArray = Array.isArray;
/**
* Checks if `value` is classified as an `ArrayBuffer` object.
*
* @static
* @memberOf _
* @since 4.3.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
* @example
*
* _.isArrayBuffer(new ArrayBuffer(2));
* // => true
*
* _.isArrayBuffer(new Array(2));
* // => false
*/
var isArrayBuffer = nodeIsArrayBuffer ? baseUnary(nodeIsArrayBuffer) : baseIsArrayBuffer;
/**
* Checks if `value` is array-like. A value is considered array-like if it's
* not a function and has a `value.length` that's an integer greater than or
* equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is array-like, else `false`.
* @example
*
* _.isArrayLike([1, 2, 3]);
* // => true
*
* _.isArrayLike(document.body.children);
* // => true
*
* _.isArrayLike('abc');
* // => true
*
* _.isArrayLike(_.noop);
* // => false
*/
function isArrayLike(value) {
return value != null && isLength(value.length) && !isFunction(value);
}
/**
* This method is like `_.isArrayLike` except that it also checks if `value`
* is an object.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an array-like object,
* else `false`.
* @example
*
* _.isArrayLikeObject([1, 2, 3]);
* // => true
*
* _.isArrayLikeObject(document.body.children);
* // => true
*
* _.isArrayLikeObject('abc');
* // => false
*
* _.isArrayLikeObject(_.noop);
* // => false
*/
function isArrayLikeObject(value) {
return isObjectLike(value) && isArrayLike(value);
}
/**
* Checks if `value` is classified as a boolean primitive or object.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a boolean, else `false`.
* @example
*
* _.isBoolean(false);
* // => true
*
* _.isBoolean(null);
* // => false
*/
function isBoolean(value) {
return value === true || value === false ||
(isObjectLike(value) && baseGetTag(value) == boolTag);
}
/**
* Checks if `value` is a buffer.
*
* @static
* @memberOf _
* @since 4.3.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
* @example
*
* _.isBuffer(new Buffer(2));
* // => true
*
* _.isBuffer(new Uint8Array(2));
* // => false
*/
var isBuffer = nativeIsBuffer || stubFalse;
/**
* Checks if `value` is classified as a `Date` object.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a date object, else `false`.
* @example
*
* _.isDate(new Date);
* // => true
*
* _.isDate('Mon April 23 2012');
* // => false
*/
var isDate = nodeIsDate ? baseUnary(nodeIsDate) : baseIsDate;
/**
* Checks if `value` is likely a DOM element.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.
* @example
*
* _.isElement(document.body);
* // => true
*
* _.isElement('<body>');
* // => false
*/
function isElement(value) {
return isObjectLike(value) && value.nodeType === 1 && !isPlainObject(value);
}
/**
* Checks if `value` is an empty object, collection, map, or set.
*
* Objects are considered empty if they have no own enumerable string keyed
* properties.
*
* Array-like values such as `arguments` objects, arrays, buffers, strings, or
* jQuery-like collections are considered empty if they have a `length` of `0`.
* Similarly, maps and sets are considered empty if they have a `size` of `0`.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is empty, else `false`.
* @example
*
* _.isEmpty(null);
* // => true
*
* _.isEmpty(true);
* // => true
*
* _.isEmpty(1);
* // => true
*
* _.isEmpty([1, 2, 3]);
* // => false
*
* _.isEmpty({ 'a': 1 });
* // => false
*/
function isEmpty(value) {
if (value == null) {
return true;
}
if (isArrayLike(value) &&
(isArray(value) || typeof value == 'string' || typeof value.splice == 'function' ||
isBuffer(value) || isTypedArray(value) || isArguments(value))) {
return !value.length;
}
var tag = getTag(value);
if (tag == mapTag || tag == setTag) {
return !value.size;
}
if (isPrototype(value)) {
return !baseKeys(value).length;
}
for (var key in value) {
if (hasOwnProperty.call(value, key)) {
return false;
}
}
return true;
}
/**
* Performs a deep comparison between two values to determine if they are
* equivalent.
*
* **Note:** This method supports comparing arrays, array buffers, booleans,
* date objects, error objects, maps, numbers, `Object` objects, regexes,
* sets, strings, symbols, and typed arrays. `Object` objects are compared
* by their own, not inherited, enumerable properties. Functions and DOM
* nodes are **not** supported.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to compare.
* @param {*} other The other value to compare.
* @returns {boolean} Returns `true` if the values are equivalent, else `false`.
* @example
*
* var object = { 'a': 1 };
* var other = { 'a': 1 };
*
* _.isEqual(object, other);
* // => true
*
* object === other;
* // => false
*/
function isEqual(value, other) {
return baseIsEqual(value, other);
}
/**
* This method is like `_.isEqual` except that it accepts `customizer` which
* is invoked to compare values. If `customizer` returns `undefined`, comparisons
* are handled by the method instead. The `customizer` is invoked with up to
* six arguments: (objValue, othValue [, index|key, object, other, stack]).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to compare.
* @param {*} other The other value to compare.
* @param {Function} [customizer] The function to customize comparisons.
* @returns {boolean} Returns `true` if the values are equivalent, else `false`.
* @example
*
* function isGreeting(value) {
* return /^h(?:i|ello)$/.test(value);
* }
*
* function customizer(objValue, othValue) {
* if (isGreeting(objValue) && isGreeting(othValue)) {
* return true;
* }
* }
*
* var array = ['hello', 'goodbye'];
* var other = ['hi', 'goodbye'];
*
* _.isEqualWith(array, other, customizer);
* // => true
*/
function isEqualWith(value, other, customizer) {
customizer = typeof customizer == 'function' ? customizer : undefined;
var result = customizer ? customizer(value, other) : undefined;
return result === undefined ? baseIsEqual(value, other, customizer) : !!result;
}
/**
* Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
* `SyntaxError`, `TypeError`, or `URIError` object.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an error object, else `false`.
* @example
*
* _.isError(new Error);
* // => true
*
* _.isError(Error);
* // => false
*/
function isError(value) {
if (!isObjectLike(value)) {
return false;
}
var tag = baseGetTag(value);
return tag == errorTag || tag == domExcTag ||
(typeof value.message == 'string' && typeof value.name == 'string' && !isPlainObject(value));
}
/**
* Checks if `value` is a finite primitive number.
*
* **Note:** This method is based on
* [`Number.isFinite`](https://mdn.io/Number/isFinite).
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
* @example
*
* _.isFinite(3);
* // => true
*
* _.isFinite(Number.MIN_VALUE);
* // => true
*
* _.isFinite(Infinity);
* // => false
*
* _.isFinite('3');
* // => false
*/
function isFinite(value) {
return typeof value == 'number' && nativeIsFinite(value);
}
/**
* Checks if `value` is classified as a `Function` object.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a function, else `false`.
* @example
*
* _.isFunction(_);
* // => true
*
* _.isFunction(/abc/);
* // => false
*/
function isFunction(value) {
if (!isObject(value)) {
return false;
}
// The use of `Object#toString` avoids issues with the `typeof` operator
// in Safari 9 which returns 'object' for typed arrays and other constructors.
var tag = baseGetTag(value);
return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
}
/**
* Checks if `value` is an integer.
*
* **Note:** This method is based on
* [`Number.isInteger`](https://mdn.io/Number/isInteger).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an integer, else `false`.
* @example
*
* _.isInteger(3);
* // => true
*
* _.isInteger(Number.MIN_VALUE);
* // => false
*
* _.isInteger(Infinity);
* // => false
*
* _.isInteger('3');
* // => false
*/
function isInteger(value) {
return typeof value == 'number' && value == toInteger(value);
}
/**
* Checks if `value` is a valid array-like length.
*
* **Note:** This method is loosely based on
* [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
* @example
*
* _.isLength(3);
* // => true
*
* _.isLength(Number.MIN_VALUE);
* // => false
*
* _.isLength(Infinity);
* // => false
*
* _.isLength('3');
* // => false
*/
function isLength(value) {
return typeof value == 'number' &&
value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
}
/**
* Checks if `value` is the
* [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
* of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an object, else `false`.
* @example
*
* _.isObject({});
* // => true
*
* _.isObject([1, 2, 3]);
* // => true
*
* _.isObject(_.noop);
* // => true
*
* _.isObject(null);
* // => false
*/
function isObject(value) {
var type = typeof value;
return value != null && (type == 'object' || type == 'function');
}
/**
* Checks if `value` is object-like. A value is object-like if it's not `null`
* and has a `typeof` result of "object".
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is object-like, else `false`.
* @example
*
* _.isObjectLike({});
* // => true
*
* _.isObjectLike([1, 2, 3]);
* // => true
*
* _.isObjectLike(_.noop);
* // => false
*
* _.isObjectLike(null);
* // => false
*/
function isObjectLike(value) {
return value != null && typeof value == 'object';
}
/**
* Checks if `value` is classified as a `Map` object.
*
* @static
* @memberOf _
* @since 4.3.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a map, else `false`.
* @example
*
* _.isMap(new Map);
* // => true
*
* _.isMap(new WeakMap);
* // => false
*/
var isMap = nodeIsMap ? baseUnary(nodeIsMap) : baseIsMap;
/**
* Performs a partial deep comparison between `object` and `source` to
* determine if `object` contains equivalent property values.
*
* **Note:** This method is equivalent to `_.matches` when `source` is
* partially applied.
*
* Partial comparisons will match empty array and empty object `source`
* values against any array or object value, respectively. See `_.isEqual`
* for a list of supported value comparisons.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Lang
* @param {Object} object The object to inspect.
* @param {Object} source The object of property values to match.
* @returns {boolean} Returns `true` if `object` is a match, else `false`.
* @example
*
* var object = { 'a': 1, 'b': 2 };
*
* _.isMatch(object, { 'b': 2 });
* // => true
*
* _.isMatch(object, { 'b': 1 });
* // => false
*/
function isMatch(object, source) {
return object === source || baseIsMatch(object, source, getMatchData(source));
}
/**
* This method is like `_.isMatch` except that it accepts `customizer` which
* is invoked to compare values. If `customizer` returns `undefined`, comparisons
* are handled by the method instead. The `customizer` is invoked with five
* arguments: (objValue, srcValue, index|key, object, source).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {Object} object The object to inspect.
* @param {Object} source The object of property values to match.
* @param {Function} [customizer] The function to customize comparisons.
* @returns {boolean} Returns `true` if `object` is a match, else `false`.
* @example
*
* function isGreeting(value) {
* return /^h(?:i|ello)$/.test(value);
* }
*
* function customizer(objValue, srcValue) {
* if (isGreeting(objValue) && isGreeting(srcValue)) {
* return true;
* }
* }
*
* var object = { 'greeting': 'hello' };
* var source = { 'greeting': 'hi' };
*
* _.isMatchWith(object, source, customizer);
* // => true
*/
function isMatchWith(object, source, customizer) {
customizer = typeof customizer == 'function' ? customizer : undefined;
return baseIsMatch(object, source, getMatchData(source), customizer);
}
/**
* Checks if `value` is `NaN`.
*
* **Note:** This method is based on
* [`Number.isNaN`](https://mdn.io/Number/isNaN) and is not the same as
* global [`isNaN`](https://mdn.io/isNaN) which returns `true` for
* `undefined` and other non-number values.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
* @example
*
* _.isNaN(NaN);
* // => true
*
* _.isNaN(new Number(NaN));
* // => true
*
* isNaN(undefined);
* // => true
*
* _.isNaN(undefined);
* // => false
*/
function isNaN(value) {
// An `NaN` primitive is the only value that is not equal to itself.
// Perform the `toStringTag` check first to avoid errors with some
// ActiveX objects in IE.
return isNumber(value) && value != +value;
}
/**
* Checks if `value` is a pristine native function.
*
* **Note:** This method can't reliably detect native functions in the presence
* of the core-js package because core-js circumvents this kind of detection.
* Despite multiple requests, the core-js maintainer has made it clear: any
* attempt to fix the detection will be obstructed. As a result, we're left
* with little choice but to throw an error. Unfortunately, this also affects
* packages, like [babel-polyfill](https://www.npmjs.com/package/babel-polyfill),
* which rely on core-js.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a native function,
* else `false`.
* @example
*
* _.isNative(Array.prototype.push);
* // => true
*
* _.isNative(_);
* // => false
*/
function isNative(value) {
if (isMaskable(value)) {
throw new Error(CORE_ERROR_TEXT);
}
return baseIsNative(value);
}
/**
* Checks if `value` is `null`.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is `null`, else `false`.
* @example
*
* _.isNull(null);
* // => true
*
* _.isNull(void 0);
* // => false
*/
function isNull(value) {
return value === null;
}
/**
* Checks if `value` is `null` or `undefined`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is nullish, else `false`.
* @example
*
* _.isNil(null);
* // => true
*
* _.isNil(void 0);
* // => true
*
* _.isNil(NaN);
* // => false
*/
function isNil(value) {
return value == null;
}
/**
* Checks if `value` is classified as a `Number` primitive or object.
*
* **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are
* classified as numbers, use the `_.isFinite` method.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a number, else `false`.
* @example
*
* _.isNumber(3);
* // => true
*
* _.isNumber(Number.MIN_VALUE);
* // => true
*
* _.isNumber(Infinity);
* // => true
*
* _.isNumber('3');
* // => false
*/
function isNumber(value) {
return typeof value == 'number' ||
(isObjectLike(value) && baseGetTag(value) == numberTag);
}
/**
* Checks if `value` is a plain object, that is, an object created by the
* `Object` constructor or one with a `[[Prototype]]` of `null`.
*
* @static
* @memberOf _
* @since 0.8.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
* @example
*
* function Foo() {
* this.a = 1;
* }
*
* _.isPlainObject(new Foo);
* // => false
*
* _.isPlainObject([1, 2, 3]);
* // => false
*
* _.isPlainObject({ 'x': 0, 'y': 0 });
* // => true
*
* _.isPlainObject(Object.create(null));
* // => true
*/
function isPlainObject(value) {
if (!isObjectLike(value) || baseGetTag(value) != objectTag) {
return false;
}
var proto = getPrototype(value);
if (proto === null) {
return true;
}
var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;
return typeof Ctor == 'function' && Ctor instanceof Ctor &&
funcToString.call(Ctor) == objectCtorString;
}
/**
* Checks if `value` is classified as a `RegExp` object.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
* @example
*
* _.isRegExp(/abc/);
* // => true
*
* _.isRegExp('/abc/');
* // => false
*/
var isRegExp = nodeIsRegExp ? baseUnary(nodeIsRegExp) : baseIsRegExp;
/**
* Checks if `value` is a safe integer. An integer is safe if it's an IEEE-754
* double precision number which isn't the result of a rounded unsafe integer.
*
* **Note:** This method is based on
* [`Number.isSafeInteger`](https://mdn.io/Number/isSafeInteger).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a safe integer, else `false`.
* @example
*
* _.isSafeInteger(3);
* // => true
*
* _.isSafeInteger(Number.MIN_VALUE);
* // => false
*
* _.isSafeInteger(Infinity);
* // => false
*
* _.isSafeInteger('3');
* // => false
*/
function isSafeInteger(value) {
return isInteger(value) && value >= -MAX_SAFE_INTEGER && value <= MAX_SAFE_INTEGER;
}
/**
* Checks if `value` is classified as a `Set` object.
*
* @static
* @memberOf _
* @since 4.3.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a set, else `false`.
* @example
*
* _.isSet(new Set);
* // => true
*
* _.isSet(new WeakSet);
* // => false
*/
var isSet = nodeIsSet ? baseUnary(nodeIsSet) : baseIsSet;
/**
* Checks if `value` is classified as a `String` primitive or object.
*
* @static
* @since 0.1.0
* @memberOf _
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a string, else `false`.
* @example
*
* _.isString('abc');
* // => true
*
* _.isString(1);
* // => false
*/
function isString(value) {
return typeof value == 'string' ||
(!isArray(value) && isObjectLike(value) && baseGetTag(value) == stringTag);
}
/**
* Checks if `value` is classified as a `Symbol` primitive or object.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
* @example
*
* _.isSymbol(Symbol.iterator);
* // => true
*
* _.isSymbol('abc');
* // => false
*/
function isSymbol(value) {
return typeof value == 'symbol' ||
(isObjectLike(value) && baseGetTag(value) == symbolTag);
}
/**
* Checks if `value` is classified as a typed array.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
* @example
*
* _.isTypedArray(new Uint8Array);
* // => true
*
* _.isTypedArray([]);
* // => false
*/
var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
/**
* Checks if `value` is `undefined`.
*
* @static
* @since 0.1.0
* @memberOf _
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
* @example
*
* _.isUndefined(void 0);
* // => true
*
* _.isUndefined(null);
* // => false
*/
function isUndefined(value) {
return value === undefined;
}
/**
* Checks if `value` is classified as a `WeakMap` object.
*
* @static
* @memberOf _
* @since 4.3.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a weak map, else `false`.
* @example
*
* _.isWeakMap(new WeakMap);
* // => true
*
* _.isWeakMap(new Map);
* // => false
*/
function isWeakMap(value) {
return isObjectLike(value) && getTag(value) == weakMapTag;
}
/**
* Checks if `value` is classified as a `WeakSet` object.
*
* @static
* @memberOf _
* @since 4.3.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a weak set, else `false`.
* @example
*
* _.isWeakSet(new WeakSet);
* // => true
*
* _.isWeakSet(new Set);
* // => false
*/
function isWeakSet(value) {
return isObjectLike(value) && baseGetTag(value) == weakSetTag;
}
/**
* Checks if `value` is less than `other`.
*
* @static
* @memberOf _
* @since 3.9.0
* @category Lang
* @param {*} value The value to compare.
* @param {*} other The other value to compare.
* @returns {boolean} Returns `true` if `value` is less than `other`,
* else `false`.
* @see _.gt
* @example
*
* _.lt(1, 3);
* // => true
*
* _.lt(3, 3);
* // => false
*
* _.lt(3, 1);
* // => false
*/
var lt = createRelationalOperation(baseLt);
/**
* Checks if `value` is less than or equal to `other`.
*
* @static
* @memberOf _
* @since 3.9.0
* @category Lang
* @param {*} value The value to compare.
* @param {*} other The other value to compare.
* @returns {boolean} Returns `true` if `value` is less than or equal to
* `other`, else `false`.
* @see _.gte
* @example
*
* _.lte(1, 3);
* // => true
*
* _.lte(3, 3);
* // => true
*
* _.lte(3, 1);
* // => false
*/
var lte = createRelationalOperation(function(value, other) {
return value <= other;
});
/**
* Converts `value` to an array.
*
* @static
* @since 0.1.0
* @memberOf _
* @category Lang
* @param {*} value The value to convert.
* @returns {Array} Returns the converted array.
* @example
*
* _.toArray({ 'a': 1, 'b': 2 });
* // => [1, 2]
*
* _.toArray('abc');
* // => ['a', 'b', 'c']
*
* _.toArray(1);
* // => []
*
* _.toArray(null);
* // => []
*/
function toArray(value) {
if (!value) {
return [];
}
if (isArrayLike(value)) {
return isString(value) ? stringToArray(value) : copyArray(value);
}
if (symIterator && value[symIterator]) {
return iteratorToArray(value[symIterator]());
}
var tag = getTag(value),
func = tag == mapTag ? mapToArray : (tag == setTag ? setToArray : values);
return func(value);
}
/**
* Converts `value` to a finite number.
*
* @static
* @memberOf _
* @since 4.12.0
* @category Lang
* @param {*} value The value to convert.
* @returns {number} Returns the converted number.
* @example
*
* _.toFinite(3.2);
* // => 3.2
*
* _.toFinite(Number.MIN_VALUE);
* // => 5e-324
*
* _.toFinite(Infinity);
* // => 1.7976931348623157e+308
*
* _.toFinite('3.2');
* // => 3.2
*/
function toFinite(value) {
if (!value) {
return value === 0 ? value : 0;
}
value = toNumber(value);
if (value === INFINITY || value === -INFINITY) {
var sign = (value < 0 ? -1 : 1);
return sign * MAX_INTEGER;
}
return value === value ? value : 0;
}
/**
* Converts `value` to an integer.
*
* **Note:** This method is loosely based on
* [`ToInteger`](http://www.ecma-international.org/ecma-262/7.0/#sec-tointeger).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to convert.
* @returns {number} Returns the converted integer.
* @example
*
* _.toInteger(3.2);
* // => 3
*
* _.toInteger(Number.MIN_VALUE);
* // => 0
*
* _.toInteger(Infinity);
* // => 1.7976931348623157e+308
*
* _.toInteger('3.2');
* // => 3
*/
function toInteger(value) {
var result = toFinite(value),
remainder = result % 1;
return result === result ? (remainder ? result - remainder : result) : 0;
}
/**
* Converts `value` to an integer suitable for use as the length of an
* array-like object.
*
* **Note:** This method is based on
* [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to convert.
* @returns {number} Returns the converted integer.
* @example
*
* _.toLength(3.2);
* // => 3
*
* _.toLength(Number.MIN_VALUE);
* // => 0
*
* _.toLength(Infinity);
* // => 4294967295
*
* _.toLength('3.2');
* // => 3
*/
function toLength(value) {
return value ? baseClamp(toInteger(value), 0, MAX_ARRAY_LENGTH) : 0;
}
/**
* Converts `value` to a number.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to process.
* @returns {number} Returns the number.
* @example
*
* _.toNumber(3.2);
* // => 3.2
*
* _.toNumber(Number.MIN_VALUE);
* // => 5e-324
*
* _.toNumber(Infinity);
* // => Infinity
*
* _.toNumber('3.2');
* // => 3.2
*/
function toNumber(value) {
if (typeof value == 'number') {
return value;
}
if (isSymbol(value)) {
return NAN;
}
if (isObject(value)) {
var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
value = isObject(other) ? (other + '') : other;
}
if (typeof value != 'string') {
return value === 0 ? value : +value;
}
value = value.replace(reTrim, '');
var isBinary = reIsBinary.test(value);
return (isBinary || reIsOctal.test(value))
? freeParseInt(value.slice(2), isBinary ? 2 : 8)
: (reIsBadHex.test(value) ? NAN : +value);
}
/**
* Converts `value` to a plain object flattening inherited enumerable string
* keyed properties of `value` to own properties of the plain object.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Lang
* @param {*} value The value to convert.
* @returns {Object} Returns the converted plain object.
* @example
*
* function Foo() {
* this.b = 2;
* }
*
* Foo.prototype.c = 3;
*
* _.assign({ 'a': 1 }, new Foo);
* // => { 'a': 1, 'b': 2 }
*
* _.assign({ 'a': 1 }, _.toPlainObject(new Foo));
* // => { 'a': 1, 'b': 2, 'c': 3 }
*/
function toPlainObject(value) {
return copyObject(value, keysIn(value));
}
/**
* Converts `value` to a safe integer. A safe integer can be compared and
* represented correctly.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to convert.
* @returns {number} Returns the converted integer.
* @example
*
* _.toSafeInteger(3.2);
* // => 3
*
* _.toSafeInteger(Number.MIN_VALUE);
* // => 0
*
* _.toSafeInteger(Infinity);
* // => 9007199254740991
*
* _.toSafeInteger('3.2');
* // => 3
*/
function toSafeInteger(value) {
return baseClamp(toInteger(value), -MAX_SAFE_INTEGER, MAX_SAFE_INTEGER);
}
/**
* Converts `value` to a string. An empty string is returned for `null`
* and `undefined` values. The sign of `-0` is preserved.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to convert.
* @returns {string} Returns the converted string.
* @example
*
* _.toString(null);
* // => ''
*
* _.toString(-0);
* // => '-0'
*
* _.toString([1, 2, 3]);
* // => '1,2,3'
*/
function toString(value) {
return value == null ? '' : baseToString(value);
}
/*------------------------------------------------------------------------*/
/**
* Assigns own enumerable string keyed properties of source objects to the
* destination object. Source objects are applied from left to right.
* Subsequent sources overwrite property assignments of previous sources.
*
* **Note:** This method mutates `object` and is loosely based on
* [`Object.assign`](https://mdn.io/Object/assign).
*
* @static
* @memberOf _
* @since 0.10.0
* @category Object
* @param {Object} object The destination object.
* @param {...Object} [sources] The source objects.
* @returns {Object} Returns `object`.
* @see _.assignIn
* @example
*
* function Foo() {
* this.a = 1;
* }
*
* function Bar() {
* this.c = 3;
* }
*
* Foo.prototype.b = 2;
* Bar.prototype.d = 4;
*
* _.assign({ 'a': 0 }, new Foo, new Bar);
* // => { 'a': 1, 'c': 3 }
*/
var assign = createAssigner(function(object, source) {
if (isPrototype(source) || isArrayLike(source)) {
copyObject(source, keys(source), object);
return;
}
for (var key in source) {
if (hasOwnProperty.call(source, key)) {
assignValue(object, key, source[key]);
}
}
});
/**
* This method is like `_.assign` except that it iterates over own and
* inherited source properties.
*
* **Note:** This method mutates `object`.
*
* @static
* @memberOf _
* @since 4.0.0
* @alias extend
* @category Object
* @param {Object} object The destination object.
* @param {...Object} [sources] The source objects.
* @returns {Object} Returns `object`.
* @see _.assign
* @example
*
* function Foo() {
* this.a = 1;
* }
*
* function Bar() {
* this.c = 3;
* }
*
* Foo.prototype.b = 2;
* Bar.prototype.d = 4;
*
* _.assignIn({ 'a': 0 }, new Foo, new Bar);
* // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }
*/
var assignIn = createAssigner(function(object, source) {
copyObject(source, keysIn(source), object);
});
/**
* This method is like `_.assignIn` except that it accepts `customizer`
* which is invoked to produce the assigned values. If `customizer` returns
* `undefined`, assignment is handled by the method instead. The `customizer`
* is invoked with five arguments: (objValue, srcValue, key, object, source).
*
* **Note:** This method mutates `object`.
*
* @static
* @memberOf _
* @since 4.0.0
* @alias extendWith
* @category Object
* @param {Object} object The destination object.
* @param {...Object} sources The source objects.
* @param {Function} [customizer] The function to customize assigned values.
* @returns {Object} Returns `object`.
* @see _.assignWith
* @example
*
* function customizer(objValue, srcValue) {
* return _.isUndefined(objValue) ? srcValue : objValue;
* }
*
* var defaults = _.partialRight(_.assignInWith, customizer);
*
* defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
* // => { 'a': 1, 'b': 2 }
*/
var assignInWith = createAssigner(function(object, source, srcIndex, customizer) {
copyObject(source, keysIn(source), object, customizer);
});
/**
* This method is like `_.assign` except that it accepts `customizer`
* which is invoked to produce the assigned values. If `customizer` returns
* `undefined`, assignment is handled by the method instead. The `customizer`
* is invoked with five arguments: (objValue, srcValue, key, object, source).
*
* **Note:** This method mutates `object`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Object
* @param {Object} object The destination object.
* @param {...Object} sources The source objects.
* @param {Function} [customizer] The function to customize assigned values.
* @returns {Object} Returns `object`.
* @see _.assignInWith
* @example
*
* function customizer(objValue, srcValue) {
* return _.isUndefined(objValue) ? srcValue : objValue;
* }
*
* var defaults = _.partialRight(_.assignWith, customizer);
*
* defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
* // => { 'a': 1, 'b': 2 }
*/
var assignWith = createAssigner(function(object, source, srcIndex, customizer) {
copyObject(source, keys(source), object, customizer);
});
/**
* Creates an array of values corresponding to `paths` of `object`.
*
* @static
* @memberOf _
* @since 1.0.0
* @category Object
* @param {Object} object The object to iterate over.
* @param {...(string|string[])} [paths] The property paths of elements to pick.
* @returns {Array} Returns the picked values.
* @example
*
* var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
*
* _.at(object, ['a[0].b.c', 'a[1]']);
* // => [3, 4]
*/
var at = flatRest(baseAt);
/**
* Creates an object that inherits from the `prototype` object. If a
* `properties` object is given, its own enumerable string keyed properties
* are assigned to the created object.
*
* @static
* @memberOf _
* @since 2.3.0
* @category Object
* @param {Object} prototype The object to inherit from.
* @param {Object} [properties] The properties to assign to the object.
* @returns {Object} Returns the new object.
* @example
*
* function Shape() {
* this.x = 0;
* this.y = 0;
* }
*
* function Circle() {
* Shape.call(this);
* }
*
* Circle.prototype = _.create(Shape.prototype, {
* 'constructor': Circle
* });
*
* var circle = new Circle;
* circle instanceof Circle;
* // => true
*
* circle instanceof Shape;
* // => true
*/
function create(prototype, properties) {
var result = baseCreate(prototype);
return properties == null ? result : baseAssign(result, properties);
}
/**
* Assigns own and inherited enumerable string keyed properties of source
* objects to the destination object for all destination properties that
* resolve to `undefined`. Source objects are applied from left to right.
* Once a property is set, additional values of the same property are ignored.
*
* **Note:** This method mutates `object`.
*
* @static
* @since 0.1.0
* @memberOf _
* @category Object
* @param {Object} object The destination object.
* @param {...Object} [sources] The source objects.
* @returns {Object} Returns `object`.
* @see _.defaultsDeep
* @example
*
* _.defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
* // => { 'a': 1, 'b': 2 }
*/
var defaults = baseRest(function(args) {
args.push(undefined, assignInDefaults);
return apply(assignInWith, undefined, args);
});
/**
* This method is like `_.defaults` except that it recursively assigns
* default properties.
*
* **Note:** This method mutates `object`.
*
* @static
* @memberOf _
* @since 3.10.0
* @category Object
* @param {Object} object The destination object.
* @param {...Object} [sources] The source objects.
* @returns {Object} Returns `object`.
* @see _.defaults
* @example
*
* _.defaultsDeep({ 'a': { 'b': 2 } }, { 'a': { 'b': 1, 'c': 3 } });
* // => { 'a': { 'b': 2, 'c': 3 } }
*/
var defaultsDeep = baseRest(function(args) {
args.push(undefined, mergeDefaults);
return apply(mergeWith, undefined, args);
});
/**
* This method is like `_.find` except that it returns the key of the first
* element `predicate` returns truthy for instead of the element itself.
*
* @static
* @memberOf _
* @since 1.1.0
* @category Object
* @param {Object} object The object to inspect.
* @param {Function} [predicate=_.identity] The function invoked per iteration.
* @returns {string|undefined} Returns the key of the matched element,
* else `undefined`.
* @example
*
* var users = {
* 'barney': { 'age': 36, 'active': true },
* 'fred': { 'age': 40, 'active': false },
* 'pebbles': { 'age': 1, 'active': true }
* };
*
* _.findKey(users, function(o) { return o.age < 40; });
* // => 'barney' (iteration order is not guaranteed)
*
* // The `_.matches` iteratee shorthand.
* _.findKey(users, { 'age': 1, 'active': true });
* // => 'pebbles'
*
* // The `_.matchesProperty` iteratee shorthand.
* _.findKey(users, ['active', false]);
* // => 'fred'
*
* // The `_.property` iteratee shorthand.
* _.findKey(users, 'active');
* // => 'barney'
*/
function findKey(object, predicate) {
return baseFindKey(object, getIteratee(predicate, 3), baseForOwn);
}
/**
* This method is like `_.findKey` except that it iterates over elements of
* a collection in the opposite order.
*
* @static
* @memberOf _
* @since 2.0.0
* @category Object
* @param {Object} object The object to inspect.
* @param {Function} [predicate=_.identity] The function invoked per iteration.
* @returns {string|undefined} Returns the key of the matched element,
* else `undefined`.
* @example
*
* var users = {
* 'barney': { 'age': 36, 'active': true },
* 'fred': { 'age': 40, 'active': false },
* 'pebbles': { 'age': 1, 'active': true }
* };
*
* _.findLastKey(users, function(o) { return o.age < 40; });
* // => returns 'pebbles' assuming `_.findKey` returns 'barney'
*
* // The `_.matches` iteratee shorthand.
* _.findLastKey(users, { 'age': 36, 'active': true });
* // => 'barney'
*
* // The `_.matchesProperty` iteratee shorthand.
* _.findLastKey(users, ['active', false]);
* // => 'fred'
*
* // The `_.property` iteratee shorthand.
* _.findLastKey(users, 'active');
* // => 'pebbles'
*/
function findLastKey(object, predicate) {
return baseFindKey(object, getIteratee(predicate, 3), baseForOwnRight);
}
/**
* Iterates over own and inherited enumerable string keyed properties of an
* object and invokes `iteratee` for each property. The iteratee is invoked
* with three arguments: (value, key, object). Iteratee functions may exit
* iteration early by explicitly returning `false`.
*
* @static
* @memberOf _
* @since 0.3.0
* @category Object
* @param {Object} object The object to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @returns {Object} Returns `object`.
* @see _.forInRight
* @example
*
* function Foo() {
* this.a = 1;
* this.b = 2;
* }
*
* Foo.prototype.c = 3;
*
* _.forIn(new Foo, function(value, key) {
* console.log(key);
* });
* // => Logs 'a', 'b', then 'c' (iteration order is not guaranteed).
*/
function forIn(object, iteratee) {
return object == null
? object
: baseFor(object, getIteratee(iteratee, 3), keysIn);
}
/**
* This method is like `_.forIn` except that it iterates over properties of
* `object` in the opposite order.
*
* @static
* @memberOf _
* @since 2.0.0
* @category Object
* @param {Object} object The object to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @returns {Object} Returns `object`.
* @see _.forIn
* @example
*
* function Foo() {
* this.a = 1;
* this.b = 2;
* }
*
* Foo.prototype.c = 3;
*
* _.forInRight(new Foo, function(value, key) {
* console.log(key);
* });
* // => Logs 'c', 'b', then 'a' assuming `_.forIn` logs 'a', 'b', then 'c'.
*/
function forInRight(object, iteratee) {
return object == null
? object
: baseForRight(object, getIteratee(iteratee, 3), keysIn);
}
/**
* Iterates over own enumerable string keyed properties of an object and
* invokes `iteratee` for each property. The iteratee is invoked with three
* arguments: (value, key, object). Iteratee functions may exit iteration
* early by explicitly returning `false`.
*
* @static
* @memberOf _
* @since 0.3.0
* @category Object
* @param {Object} object The object to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @returns {Object} Returns `object`.
* @see _.forOwnRight
* @example
*
* function Foo() {
* this.a = 1;
* this.b = 2;
* }
*
* Foo.prototype.c = 3;
*
* _.forOwn(new Foo, function(value, key) {
* console.log(key);
* });
* // => Logs 'a' then 'b' (iteration order is not guaranteed).
*/
function forOwn(object, iteratee) {
return object && baseForOwn(object, getIteratee(iteratee, 3));
}
/**
* This method is like `_.forOwn` except that it iterates over properties of
* `object` in the opposite order.
*
* @static
* @memberOf _
* @since 2.0.0
* @category Object
* @param {Object} object The object to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @returns {Object} Returns `object`.
* @see _.forOwn
* @example
*
* function Foo() {
* this.a = 1;
* this.b = 2;
* }
*
* Foo.prototype.c = 3;
*
* _.forOwnRight(new Foo, function(value, key) {
* console.log(key);
* });
* // => Logs 'b' then 'a' assuming `_.forOwn` logs 'a' then 'b'.
*/
function forOwnRight(object, iteratee) {
return object && baseForOwnRight(object, getIteratee(iteratee, 3));
}
/**
* Creates an array of function property names from own enumerable properties
* of `object`.
*
* @static
* @since 0.1.0
* @memberOf _
* @category Object
* @param {Object} object The object to inspect.
* @returns {Array} Returns the function names.
* @see _.functionsIn
* @example
*
* function Foo() {
* this.a = _.constant('a');
* this.b = _.constant('b');
* }
*
* Foo.prototype.c = _.constant('c');
*
* _.functions(new Foo);
* // => ['a', 'b']
*/
function functions(object) {
return object == null ? [] : baseFunctions(object, keys(object));
}
/**
* Creates an array of function property names from own and inherited
* enumerable properties of `object`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Object
* @param {Object} object The object to inspect.
* @returns {Array} Returns the function names.
* @see _.functions
* @example
*
* function Foo() {
* this.a = _.constant('a');
* this.b = _.constant('b');
* }
*
* Foo.prototype.c = _.constant('c');
*
* _.functionsIn(new Foo);
* // => ['a', 'b', 'c']
*/
function functionsIn(object) {
return object == null ? [] : baseFunctions(object, keysIn(object));
}
/**
* Gets the value at `path` of `object`. If the resolved value is
* `undefined`, the `defaultValue` is returned in its place.
*
* @static
* @memberOf _
* @since 3.7.0
* @category Object
* @param {Object} object The object to query.
* @param {Array|string} path The path of the property to get.
* @param {*} [defaultValue] The value returned for `undefined` resolved values.
* @returns {*} Returns the resolved value.
* @example
*
* var object = { 'a': [{ 'b': { 'c': 3 } }] };
*
* _.get(object, 'a[0].b.c');
* // => 3
*
* _.get(object, ['a', '0', 'b', 'c']);
* // => 3
*
* _.get(object, 'a.b.c', 'default');
* // => 'default'
*/
function get(object, path, defaultValue) {
var result = object == null ? undefined : baseGet(object, path);
return result === undefined ? defaultValue : result;
}
/**
* Checks if `path` is a direct property of `object`.
*
* @static
* @since 0.1.0
* @memberOf _
* @category Object
* @param {Object} object The object to query.
* @param {Array|string} path The path to check.
* @returns {boolean} Returns `true` if `path` exists, else `false`.
* @example
*
* var object = { 'a': { 'b': 2 } };
* var other = _.create({ 'a': _.create({ 'b': 2 }) });
*
* _.has(object, 'a');
* // => true
*
* _.has(object, 'a.b');
* // => true
*
* _.has(object, ['a', 'b']);
* // => true
*
* _.has(other, 'a');
* // => false
*/
function has(object, path) {
return object != null && hasPath(object, path, baseHas);
}
/**
* Checks if `path` is a direct or inherited property of `object`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Object
* @param {Object} object The object to query.
* @param {Array|string} path The path to check.
* @returns {boolean} Returns `true` if `path` exists, else `false`.
* @example
*
* var object = _.create({ 'a': _.create({ 'b': 2 }) });
*
* _.hasIn(object, 'a');
* // => true
*
* _.hasIn(object, 'a.b');
* // => true
*
* _.hasIn(object, ['a', 'b']);
* // => true
*
* _.hasIn(object, 'b');
* // => false
*/
function hasIn(object, path) {
return object != null && hasPath(object, path, baseHasIn);
}
/**
* Creates an object composed of the inverted keys and values of `object`.
* If `object` contains duplicate values, subsequent values overwrite
* property assignments of previous values.
*
* @static
* @memberOf _
* @since 0.7.0
* @category Object
* @param {Object} object The object to invert.
* @returns {Object} Returns the new inverted object.
* @example
*
* var object = { 'a': 1, 'b': 2, 'c': 1 };
*
* _.invert(object);
* // => { '1': 'c', '2': 'b' }
*/
var invert = createInverter(function(result, value, key) {
result[value] = key;
}, constant(identity));
/**
* This method is like `_.invert` except that the inverted object is generated
* from the results of running each element of `object` thru `iteratee`. The
* corresponding inverted value of each inverted key is an array of keys
* responsible for generating the inverted value. The iteratee is invoked
* with one argument: (value).
*
* @static
* @memberOf _
* @since 4.1.0
* @category Object
* @param {Object} object The object to invert.
* @param {Function} [iteratee=_.identity] The iteratee invoked per element.
* @returns {Object} Returns the new inverted object.
* @example
*
* var object = { 'a': 1, 'b': 2, 'c': 1 };
*
* _.invertBy(object);
* // => { '1': ['a', 'c'], '2': ['b'] }
*
* _.invertBy(object, function(value) {
* return 'group' + value;
* });
* // => { 'group1': ['a', 'c'], 'group2': ['b'] }
*/
var invertBy = createInverter(function(result, value, key) {
if (hasOwnProperty.call(result, value)) {
result[value].push(key);
} else {
result[value] = [key];
}
}, getIteratee);
/**
* Invokes the method at `path` of `object`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Object
* @param {Object} object The object to query.
* @param {Array|string} path The path of the method to invoke.
* @param {...*} [args] The arguments to invoke the method with.
* @returns {*} Returns the result of the invoked method.
* @example
*
* var object = { 'a': [{ 'b': { 'c': [1, 2, 3, 4] } }] };
*
* _.invoke(object, 'a[0].b.c.slice', 1, 3);
* // => [2, 3]
*/
var invoke = baseRest(baseInvoke);
/**
* Creates an array of the own enumerable property names of `object`.
*
* **Note:** Non-object values are coerced to objects. See the
* [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
* for more details.
*
* @static
* @since 0.1.0
* @memberOf _
* @category Object
* @param {Object} object The object to query.
* @returns {Array} Returns the array of property names.
* @example
*
* function Foo() {
* this.a = 1;
* this.b = 2;
* }
*
* Foo.prototype.c = 3;
*
* _.keys(new Foo);
* // => ['a', 'b'] (iteration order is not guaranteed)
*
* _.keys('hi');
* // => ['0', '1']
*/
function keys(object) {
return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
}
/**
* Creates an array of the own and inherited enumerable property names of `object`.
*
* **Note:** Non-object values are coerced to objects.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Object
* @param {Object} object The object to query.
* @returns {Array} Returns the array of property names.
* @example
*
* function Foo() {
* this.a = 1;
* this.b = 2;
* }
*
* Foo.prototype.c = 3;
*
* _.keysIn(new Foo);
* // => ['a', 'b', 'c'] (iteration order is not guaranteed)
*/
function keysIn(object) {
return isArrayLike(object) ? arrayLikeKeys(object, true) : baseKeysIn(object);
}
/**
* The opposite of `_.mapValues`; this method creates an object with the
* same values as `object` and keys generated by running each own enumerable
* string keyed property of `object` thru `iteratee`. The iteratee is invoked
* with three arguments: (value, key, object).
*
* @static
* @memberOf _
* @since 3.8.0
* @category Object
* @param {Object} object The object to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @returns {Object} Returns the new mapped object.
* @see _.mapValues
* @example
*
* _.mapKeys({ 'a': 1, 'b': 2 }, function(value, key) {
* return key + value;
* });
* // => { 'a1': 1, 'b2': 2 }
*/
function mapKeys(object, iteratee) {
var result = {};
iteratee = getIteratee(iteratee, 3);
baseForOwn(object, function(value, key, object) {
baseAssignValue(result, iteratee(value, key, object), value);
});
return result;
}
/**
* Creates an object with the same keys as `object` and values generated
* by running each own enumerable string keyed property of `object` thru
* `iteratee`. The iteratee is invoked with three arguments:
* (value, key, object).
*
* @static
* @memberOf _
* @since 2.4.0
* @category Object
* @param {Object} object The object to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @returns {Object} Returns the new mapped object.
* @see _.mapKeys
* @example
*
* var users = {
* 'fred': { 'user': 'fred', 'age': 40 },
* 'pebbles': { 'user': 'pebbles', 'age': 1 }
* };
*
* _.mapValues(users, function(o) { return o.age; });
* // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
*
* // The `_.property` iteratee shorthand.
* _.mapValues(users, 'age');
* // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
*/
function mapValues(object, iteratee) {
var result = {};
iteratee = getIteratee(iteratee, 3);
baseForOwn(object, function(value, key, object) {
baseAssignValue(result, key, iteratee(value, key, object));
});
return result;
}
/**
* This method is like `_.assign` except that it recursively merges own and
* inherited enumerable string keyed properties of source objects into the
* destination object. Source properties that resolve to `undefined` are
* skipped if a destination value exists. Array and plain object properties
* are merged recursively. Other objects and value types are overridden by
* assignment. Source objects are applied from left to right. Subsequent
* sources overwrite property assignments of previous sources.
*
* **Note:** This method mutates `object`.
*
* @static
* @memberOf _
* @since 0.5.0
* @category Object
* @param {Object} object The destination object.
* @param {...Object} [sources] The source objects.
* @returns {Object} Returns `object`.
* @example
*
* var object = {
* 'a': [{ 'b': 2 }, { 'd': 4 }]
* };
*
* var other = {
* 'a': [{ 'c': 3 }, { 'e': 5 }]
* };
*
* _.merge(object, other);
* // => { 'a': [{ 'b': 2, 'c': 3 }, { 'd': 4, 'e': 5 }] }
*/
var merge = createAssigner(function(object, source, srcIndex) {
baseMerge(object, source, srcIndex);
});
/**
* This method is like `_.merge` except that it accepts `customizer` which
* is invoked to produce the merged values of the destination and source
* properties. If `customizer` returns `undefined`, merging is handled by the
* method instead. The `customizer` is invoked with six arguments:
* (objValue, srcValue, key, object, source, stack).
*
* **Note:** This method mutates `object`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Object
* @param {Object} object The destination object.
* @param {...Object} sources The source objects.
* @param {Function} customizer The function to customize assigned values.
* @returns {Object} Returns `object`.
* @example
*
* function customizer(objValue, srcValue) {
* if (_.isArray(objValue)) {
* return objValue.concat(srcValue);
* }
* }
*
* var object = { 'a': [1], 'b': [2] };
* var other = { 'a': [3], 'b': [4] };
*
* _.mergeWith(object, other, customizer);
* // => { 'a': [1, 3], 'b': [2, 4] }
*/
var mergeWith = createAssigner(function(object, source, srcIndex, customizer) {
baseMerge(object, source, srcIndex, customizer);
});
/**
* The opposite of `_.pick`; this method creates an object composed of the
* own and inherited enumerable string keyed properties of `object` that are
* not omitted.
*
* @static
* @since 0.1.0
* @memberOf _
* @category Object
* @param {Object} object The source object.
* @param {...(string|string[])} [props] The property identifiers to omit.
* @returns {Object} Returns the new object.
* @example
*
* var object = { 'a': 1, 'b': '2', 'c': 3 };
*
* _.omit(object, ['a', 'c']);
* // => { 'b': '2' }
*/
var omit = flatRest(function(object, props) {
if (object == null) {
return {};
}
props = arrayMap(props, toKey);
return basePick(object, baseDifference(getAllKeysIn(object), props));
});
/**
* The opposite of `_.pickBy`; this method creates an object composed of
* the own and inherited enumerable string keyed properties of `object` that
* `predicate` doesn't return truthy for. The predicate is invoked with two
* arguments: (value, key).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Object
* @param {Object} object The source object.
* @param {Function} [predicate=_.identity] The function invoked per property.
* @returns {Object} Returns the new object.
* @example
*
* var object = { 'a': 1, 'b': '2', 'c': 3 };
*
* _.omitBy(object, _.isNumber);
* // => { 'b': '2' }
*/
function omitBy(object, predicate) {
return pickBy(object, negate(getIteratee(predicate)));
}
/**
* Creates an object composed of the picked `object` properties.
*
* @static
* @since 0.1.0
* @memberOf _
* @category Object
* @param {Object} object The source object.
* @param {...(string|string[])} [props] The property identifiers to pick.
* @returns {Object} Returns the new object.
* @example
*
* var object = { 'a': 1, 'b': '2', 'c': 3 };
*
* _.pick(object, ['a', 'c']);
* // => { 'a': 1, 'c': 3 }
*/
var pick = flatRest(function(object, props) {
return object == null ? {} : basePick(object, arrayMap(props, toKey));
});
/**
* Creates an object composed of the `object` properties `predicate` returns
* truthy for. The predicate is invoked with two arguments: (value, key).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Object
* @param {Object} object The source object.
* @param {Function} [predicate=_.identity] The function invoked per property.
* @returns {Object} Returns the new object.
* @example
*
* var object = { 'a': 1, 'b': '2', 'c': 3 };
*
* _.pickBy(object, _.isNumber);
* // => { 'a': 1, 'c': 3 }
*/
function pickBy(object, predicate) {
return object == null ? {} : basePickBy(object, getAllKeysIn(object), getIteratee(predicate));
}
/**
* This method is like `_.get` except that if the resolved value is a
* function it's invoked with the `this` binding of its parent object and
* its result is returned.
*
* @static
* @since 0.1.0
* @memberOf _
* @category Object
* @param {Object} object The object to query.
* @param {Array|string} path The path of the property to resolve.
* @param {*} [defaultValue] The value returned for `undefined` resolved values.
* @returns {*} Returns the resolved value.
* @example
*
* var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] };
*
* _.result(object, 'a[0].b.c1');
* // => 3
*
* _.result(object, 'a[0].b.c2');
* // => 4
*
* _.result(object, 'a[0].b.c3', 'default');
* // => 'default'
*
* _.result(object, 'a[0].b.c3', _.constant('default'));
* // => 'default'
*/
function result(object, path, defaultValue) {
path = isKey(path, object) ? [path] : castPath(path);
var index = -1,
length = path.length;
// Ensure the loop is entered when path is empty.
if (!length) {
object = undefined;
length = 1;
}
while (++index < length) {
var value = object == null ? undefined : object[toKey(path[index])];
if (value === undefined) {
index = length;
value = defaultValue;
}
object = isFunction(value) ? value.call(object) : value;
}
return object;
}
/**
* Sets the value at `path` of `object`. If a portion of `path` doesn't exist,
* it's created. Arrays are created for missing index properties while objects
* are created for all other missing properties. Use `_.setWith` to customize
* `path` creation.
*
* **Note:** This method mutates `object`.
*
* @static
* @memberOf _
* @since 3.7.0
* @category Object
* @param {Object} object The object to modify.
* @param {Array|string} path The path of the property to set.
* @param {*} value The value to set.
* @returns {Object} Returns `object`.
* @example
*
* var object = { 'a': [{ 'b': { 'c': 3 } }] };
*
* _.set(object, 'a[0].b.c', 4);
* console.log(object.a[0].b.c);
* // => 4
*
* _.set(object, ['x', '0', 'y', 'z'], 5);
* console.log(object.x[0].y.z);
* // => 5
*/
function set(object, path, value) {
return object == null ? object : baseSet(object, path, value);
}
/**
* This method is like `_.set` except that it accepts `customizer` which is
* invoked to produce the objects of `path`. If `customizer` returns `undefined`
* path creation is handled by the method instead. The `customizer` is invoked
* with three arguments: (nsValue, key, nsObject).
*
* **Note:** This method mutates `object`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Object
* @param {Object} object The object to modify.
* @param {Array|string} path The path of the property to set.
* @param {*} value The value to set.
* @param {Function} [customizer] The function to customize assigned values.
* @returns {Object} Returns `object`.
* @example
*
* var object = {};
*
* _.setWith(object, '[0][1]', 'a', Object);
* // => { '0': { '1': 'a' } }
*/
function setWith(object, path, value, customizer) {
customizer = typeof customizer == 'function' ? customizer : undefined;
return object == null ? object : baseSet(object, path, value, customizer);
}
/**
* Creates an array of own enumerable string keyed-value pairs for `object`
* which can be consumed by `_.fromPairs`. If `object` is a map or set, its
* entries are returned.
*
* @static
* @memberOf _
* @since 4.0.0
* @alias entries
* @category Object
* @param {Object} object The object to query.
* @returns {Array} Returns the key-value pairs.
* @example
*
* function Foo() {
* this.a = 1;
* this.b = 2;
* }
*
* Foo.prototype.c = 3;
*
* _.toPairs(new Foo);
* // => [['a', 1], ['b', 2]] (iteration order is not guaranteed)
*/
var toPairs = createToPairs(keys);
/**
* Creates an array of own and inherited enumerable string keyed-value pairs
* for `object` which can be consumed by `_.fromPairs`. If `object` is a map
* or set, its entries are returned.
*
* @static
* @memberOf _
* @since 4.0.0
* @alias entriesIn
* @category Object
* @param {Object} object The object to query.
* @returns {Array} Returns the key-value pairs.
* @example
*
* function Foo() {
* this.a = 1;
* this.b = 2;
* }
*
* Foo.prototype.c = 3;
*
* _.toPairsIn(new Foo);
* // => [['a', 1], ['b', 2], ['c', 3]] (iteration order is not guaranteed)
*/
var toPairsIn = createToPairs(keysIn);
/**
* An alternative to `_.reduce`; this method transforms `object` to a new
* `accumulator` object which is the result of running each of its own
* enumerable string keyed properties thru `iteratee`, with each invocation
* potentially mutating the `accumulator` object. If `accumulator` is not
* provided, a new object with the same `[[Prototype]]` will be used. The
* iteratee is invoked with four arguments: (accumulator, value, key, object).
* Iteratee functions may exit iteration early by explicitly returning `false`.
*
* @static
* @memberOf _
* @since 1.3.0
* @category Object
* @param {Object} object The object to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @param {*} [accumulator] The custom accumulator value.
* @returns {*} Returns the accumulated value.
* @example
*
* _.transform([2, 3, 4], function(result, n) {
* result.push(n *= n);
* return n % 2 == 0;
* }, []);
* // => [4, 9]
*
* _.transform({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
* (result[value] || (result[value] = [])).push(key);
* }, {});
* // => { '1': ['a', 'c'], '2': ['b'] }
*/
function transform(object, iteratee, accumulator) {
var isArr = isArray(object),
isArrLike = isArr || isBuffer(object) || isTypedArray(object);
iteratee = getIteratee(iteratee, 4);
if (accumulator == null) {
var Ctor = object && object.constructor;
if (isArrLike) {
accumulator = isArr ? new Ctor : [];
}
else if (isObject(object)) {
accumulator = isFunction(Ctor) ? baseCreate(getPrototype(object)) : {};
}
else {
accumulator = {};
}
}
(isArrLike ? arrayEach : baseForOwn)(object, function(value, index, object) {
return iteratee(accumulator, value, index, object);
});
return accumulator;
}
/**
* Removes the property at `path` of `object`.
*
* **Note:** This method mutates `object`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Object
* @param {Object} object The object to modify.
* @param {Array|string} path The path of the property to unset.
* @returns {boolean} Returns `true` if the property is deleted, else `false`.
* @example
*
* var object = { 'a': [{ 'b': { 'c': 7 } }] };
* _.unset(object, 'a[0].b.c');
* // => true
*
* console.log(object);
* // => { 'a': [{ 'b': {} }] };
*
* _.unset(object, ['a', '0', 'b', 'c']);
* // => true
*
* console.log(object);
* // => { 'a': [{ 'b': {} }] };
*/
function unset(object, path) {
return object == null ? true : baseUnset(object, path);
}
/**
* This method is like `_.set` except that accepts `updater` to produce the
* value to set. Use `_.updateWith` to customize `path` creation. The `updater`
* is invoked with one argument: (value).
*
* **Note:** This method mutates `object`.
*
* @static
* @memberOf _
* @since 4.6.0
* @category Object
* @param {Object} object The object to modify.
* @param {Array|string} path The path of the property to set.
* @param {Function} updater The function to produce the updated value.
* @returns {Object} Returns `object`.
* @example
*
* var object = { 'a': [{ 'b': { 'c': 3 } }] };
*
* _.update(object, 'a[0].b.c', function(n) { return n * n; });
* console.log(object.a[0].b.c);
* // => 9
*
* _.update(object, 'x[0].y.z', function(n) { return n ? n + 1 : 0; });
* console.log(object.x[0].y.z);
* // => 0
*/
function update(object, path, updater) {
return object == null ? object : baseUpdate(object, path, castFunction(updater));
}
/**
* This method is like `_.update` except that it accepts `customizer` which is
* invoked to produce the objects of `path`. If `customizer` returns `undefined`
* path creation is handled by the method instead. The `customizer` is invoked
* with three arguments: (nsValue, key, nsObject).
*
* **Note:** This method mutates `object`.
*
* @static
* @memberOf _
* @since 4.6.0
* @category Object
* @param {Object} object The object to modify.
* @param {Array|string} path The path of the property to set.
* @param {Function} updater The function to produce the updated value.
* @param {Function} [customizer] The function to customize assigned values.
* @returns {Object} Returns `object`.
* @example
*
* var object = {};
*
* _.updateWith(object, '[0][1]', _.constant('a'), Object);
* // => { '0': { '1': 'a' } }
*/
function updateWith(object, path, updater, customizer) {
customizer = typeof customizer == 'function' ? customizer : undefined;
return object == null ? object : baseUpdate(object, path, castFunction(updater), customizer);
}
/**
* Creates an array of the own enumerable string keyed property values of `object`.
*
* **Note:** Non-object values are coerced to objects.
*
* @static
* @since 0.1.0
* @memberOf _
* @category Object
* @param {Object} object The object to query.
* @returns {Array} Returns the array of property values.
* @example
*
* function Foo() {
* this.a = 1;
* this.b = 2;
* }
*
* Foo.prototype.c = 3;
*
* _.values(new Foo);
* // => [1, 2] (iteration order is not guaranteed)
*
* _.values('hi');
* // => ['h', 'i']
*/
function values(object) {
return object == null ? [] : baseValues(object, keys(object));
}
/**
* Creates an array of the own and inherited enumerable string keyed property
* values of `object`.
*
* **Note:** Non-object values are coerced to objects.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Object
* @param {Object} object The object to query.
* @returns {Array} Returns the array of property values.
* @example
*
* function Foo() {
* this.a = 1;
* this.b = 2;
* }
*
* Foo.prototype.c = 3;
*
* _.valuesIn(new Foo);
* // => [1, 2, 3] (iteration order is not guaranteed)
*/
function valuesIn(object) {
return object == null ? [] : baseValues(object, keysIn(object));
}
/*------------------------------------------------------------------------*/
/**
* Clamps `number` within the inclusive `lower` and `upper` bounds.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Number
* @param {number} number The number to clamp.
* @param {number} [lower] The lower bound.
* @param {number} upper The upper bound.
* @returns {number} Returns the clamped number.
* @example
*
* _.clamp(-10, -5, 5);
* // => -5
*
* _.clamp(10, -5, 5);
* // => 5
*/
function clamp(number, lower, upper) {
if (upper === undefined) {
upper = lower;
lower = undefined;
}
if (upper !== undefined) {
upper = toNumber(upper);
upper = upper === upper ? upper : 0;
}
if (lower !== undefined) {
lower = toNumber(lower);
lower = lower === lower ? lower : 0;
}
return baseClamp(toNumber(number), lower, upper);
}
/**
* Checks if `n` is between `start` and up to, but not including, `end`. If
* `end` is not specified, it's set to `start` with `start` then set to `0`.
* If `start` is greater than `end` the params are swapped to support
* negative ranges.
*
* @static
* @memberOf _
* @since 3.3.0
* @category Number
* @param {number} number The number to check.
* @param {number} [start=0] The start of the range.
* @param {number} end The end of the range.
* @returns {boolean} Returns `true` if `number` is in the range, else `false`.
* @see _.range, _.rangeRight
* @example
*
* _.inRange(3, 2, 4);
* // => true
*
* _.inRange(4, 8);
* // => true
*
* _.inRange(4, 2);
* // => false
*
* _.inRange(2, 2);
* // => false
*
* _.inRange(1.2, 2);
* // => true
*
* _.inRange(5.2, 4);
* // => false
*
* _.inRange(-3, -2, -6);
* // => true
*/
function inRange(number, start, end) {
start = toFinite(start);
if (end === undefined) {
end = start;
start = 0;
} else {
end = toFinite(end);
}
number = toNumber(number);
return baseInRange(number, start, end);
}
/**
* Produces a random number between the inclusive `lower` and `upper` bounds.
* If only one argument is provided a number between `0` and the given number
* is returned. If `floating` is `true`, or either `lower` or `upper` are
* floats, a floating-point number is returned instead of an integer.
*
* **Note:** JavaScript follows the IEEE-754 standard for resolving
* floating-point values which can produce unexpected results.
*
* @static
* @memberOf _
* @since 0.7.0
* @category Number
* @param {number} [lower=0] The lower bound.
* @param {number} [upper=1] The upper bound.
* @param {boolean} [floating] Specify returning a floating-point number.
* @returns {number} Returns the random number.
* @example
*
* _.random(0, 5);
* // => an integer between 0 and 5
*
* _.random(5);
* // => also an integer between 0 and 5
*
* _.random(5, true);
* // => a floating-point number between 0 and 5
*
* _.random(1.2, 5.2);
* // => a floating-point number between 1.2 and 5.2
*/
function random(lower, upper, floating) {
if (floating && typeof floating != 'boolean' && isIterateeCall(lower, upper, floating)) {
upper = floating = undefined;
}
if (floating === undefined) {
if (typeof upper == 'boolean') {
floating = upper;
upper = undefined;
}
else if (typeof lower == 'boolean') {
floating = lower;
lower = undefined;
}
}
if (lower === undefined && upper === undefined) {
lower = 0;
upper = 1;
}
else {
lower = toFinite(lower);
if (upper === undefined) {
upper = lower;
lower = 0;
} else {
upper = toFinite(upper);
}
}
if (lower > upper) {
var temp = lower;
lower = upper;
upper = temp;
}
if (floating || lower % 1 || upper % 1) {
var rand = nativeRandom();
return nativeMin(lower + (rand * (upper - lower + freeParseFloat('1e-' + ((rand + '').length - 1)))), upper);
}
return baseRandom(lower, upper);
}
/*------------------------------------------------------------------------*/
/**
* Converts `string` to [camel case](https://en.wikipedia.org/wiki/CamelCase).
*
* @static
* @memberOf _
* @since 3.0.0
* @category String
* @param {string} [string=''] The string to convert.
* @returns {string} Returns the camel cased string.
* @example
*
* _.camelCase('Foo Bar');
* // => 'fooBar'
*
* _.camelCase('--foo-bar--');
* // => 'fooBar'
*
* _.camelCase('__FOO_BAR__');
* // => 'fooBar'
*/
var camelCase = createCompounder(function(result, word, index) {
word = word.toLowerCase();
return result + (index ? capitalize(word) : word);
});
/**
* Converts the first character of `string` to upper case and the remaining
* to lower case.
*
* @static
* @memberOf _
* @since 3.0.0
* @category String
* @param {string} [string=''] The string to capitalize.
* @returns {string} Returns the capitalized string.
* @example
*
* _.capitalize('FRED');
* // => 'Fred'
*/
function capitalize(string) {
return upperFirst(toString(string).toLowerCase());
}
/**
* Deburrs `string` by converting
* [Latin-1 Supplement](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)
* and [Latin Extended-A](https://en.wikipedia.org/wiki/Latin_Extended-A)
* letters to basic Latin letters and removing
* [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks).
*
* @static
* @memberOf _
* @since 3.0.0
* @category String
* @param {string} [string=''] The string to deburr.
* @returns {string} Returns the deburred string.
* @example
*
* _.deburr('déjà vu');
* // => 'deja vu'
*/
function deburr(string) {
string = toString(string);
return string && string.replace(reLatin, deburrLetter).replace(reComboMark, '');
}
/**
* Checks if `string` ends with the given target string.
*
* @static
* @memberOf _
* @since 3.0.0
* @category String
* @param {string} [string=''] The string to inspect.
* @param {string} [target] The string to search for.
* @param {number} [position=string.length] The position to search up to.
* @returns {boolean} Returns `true` if `string` ends with `target`,
* else `false`.
* @example
*
* _.endsWith('abc', 'c');
* // => true
*
* _.endsWith('abc', 'b');
* // => false
*
* _.endsWith('abc', 'b', 2);
* // => true
*/
function endsWith(string, target, position) {
string = toString(string);
target = baseToString(target);
var length = string.length;
position = position === undefined
? length
: baseClamp(toInteger(position), 0, length);
var end = position;
position -= target.length;
return position >= 0 && string.slice(position, end) == target;
}
/**
* Converts the characters "&", "<", ">", '"', and "'" in `string` to their
* corresponding HTML entities.
*
* **Note:** No other characters are escaped. To escape additional
* characters use a third-party library like [_he_](https://mths.be/he).
*
* Though the ">" character is escaped for symmetry, characters like
* ">" and "/" don't need escaping in HTML and have no special meaning
* unless they're part of a tag or unquoted attribute value. See
* [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands)
* (under "semi-related fun fact") for more details.
*
* When working with HTML you should always
* [quote attribute values](http://wonko.com/post/html-escaping) to reduce
* XSS vectors.
*
* @static
* @since 0.1.0
* @memberOf _
* @category String
* @param {string} [string=''] The string to escape.
* @returns {string} Returns the escaped string.
* @example
*
* _.escape('fred, barney, & pebbles');
* // => 'fred, barney, &amp; pebbles'
*/
function escape(string) {
string = toString(string);
return (string && reHasUnescapedHtml.test(string))
? string.replace(reUnescapedHtml, escapeHtmlChar)
: string;
}
/**
* Escapes the `RegExp` special characters "^", "$", "\", ".", "*", "+",
* "?", "(", ")", "[", "]", "{", "}", and "|" in `string`.
*
* @static
* @memberOf _
* @since 3.0.0
* @category String
* @param {string} [string=''] The string to escape.
* @returns {string} Returns the escaped string.
* @example
*
* _.escapeRegExp('[lodash](https://lodash.com/)');
* // => '\[lodash\]\(https://lodash\.com/\)'
*/
function escapeRegExp(string) {
string = toString(string);
return (string && reHasRegExpChar.test(string))
? string.replace(reRegExpChar, '\\$&')
: string;
}
/**
* Converts `string` to
* [kebab case](https://en.wikipedia.org/wiki/Letter_case#Special_case_styles).
*
* @static
* @memberOf _
* @since 3.0.0
* @category String
* @param {string} [string=''] The string to convert.
* @returns {string} Returns the kebab cased string.
* @example
*
* _.kebabCase('Foo Bar');
* // => 'foo-bar'
*
* _.kebabCase('fooBar');
* // => 'foo-bar'
*
* _.kebabCase('__FOO_BAR__');
* // => 'foo-bar'
*/
var kebabCase = createCompounder(function(result, word, index) {
return result + (index ? '-' : '') + word.toLowerCase();
});
/**
* Converts `string`, as space separated words, to lower case.
*
* @static
* @memberOf _
* @since 4.0.0
* @category String
* @param {string} [string=''] The string to convert.
* @returns {string} Returns the lower cased string.
* @example
*
* _.lowerCase('--Foo-Bar--');
* // => 'foo bar'
*
* _.lowerCase('fooBar');
* // => 'foo bar'
*
* _.lowerCase('__FOO_BAR__');
* // => 'foo bar'
*/
var lowerCase = createCompounder(function(result, word, index) {
return result + (index ? ' ' : '') + word.toLowerCase();
});
/**
* Converts the first character of `string` to lower case.
*
* @static
* @memberOf _
* @since 4.0.0
* @category String
* @param {string} [string=''] The string to convert.
* @returns {string} Returns the converted string.
* @example
*
* _.lowerFirst('Fred');
* // => 'fred'
*
* _.lowerFirst('FRED');
* // => 'fRED'
*/
var lowerFirst = createCaseFirst('toLowerCase');
/**
* Pads `string` on the left and right sides if it's shorter than `length`.
* Padding characters are truncated if they can't be evenly divided by `length`.
*
* @static
* @memberOf _
* @since 3.0.0
* @category String
* @param {string} [string=''] The string to pad.
* @param {number} [length=0] The padding length.
* @param {string} [chars=' '] The string used as padding.
* @returns {string} Returns the padded string.
* @example
*
* _.pad('abc', 8);
* // => ' abc '
*
* _.pad('abc', 8, '_-');
* // => '_-abc_-_'
*
* _.pad('abc', 3);
* // => 'abc'
*/
function pad(string, length, chars) {
string = toString(string);
length = toInteger(length);
var strLength = length ? stringSize(string) : 0;
if (!length || strLength >= length) {
return string;
}
var mid = (length - strLength) / 2;
return (
createPadding(nativeFloor(mid), chars) +
string +
createPadding(nativeCeil(mid), chars)
);
}
/**
* Pads `string` on the right side if it's shorter than `length`. Padding
* characters are truncated if they exceed `length`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category String
* @param {string} [string=''] The string to pad.
* @param {number} [length=0] The padding length.
* @param {string} [chars=' '] The string used as padding.
* @returns {string} Returns the padded string.
* @example
*
* _.padEnd('abc', 6);
* // => 'abc '
*
* _.padEnd('abc', 6, '_-');
* // => 'abc_-_'
*
* _.padEnd('abc', 3);
* // => 'abc'
*/
function padEnd(string, length, chars) {
string = toString(string);
length = toInteger(length);
var strLength = length ? stringSize(string) : 0;
return (length && strLength < length)
? (string + createPadding(length - strLength, chars))
: string;
}
/**
* Pads `string` on the left side if it's shorter than `length`. Padding
* characters are truncated if they exceed `length`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category String
* @param {string} [string=''] The string to pad.
* @param {number} [length=0] The padding length.
* @param {string} [chars=' '] The string used as padding.
* @returns {string} Returns the padded string.
* @example
*
* _.padStart('abc', 6);
* // => ' abc'
*
* _.padStart('abc', 6, '_-');
* // => '_-_abc'
*
* _.padStart('abc', 3);
* // => 'abc'
*/
function padStart(string, length, chars) {
string = toString(string);
length = toInteger(length);
var strLength = length ? stringSize(string) : 0;
return (length && strLength < length)
? (createPadding(length - strLength, chars) + string)
: string;
}
/**
* Converts `string` to an integer of the specified radix. If `radix` is
* `undefined` or `0`, a `radix` of `10` is used unless `value` is a
* hexadecimal, in which case a `radix` of `16` is used.
*
* **Note:** This method aligns with the
* [ES5 implementation](https://es5.github.io/#x15.1.2.2) of `parseInt`.
*
* @static
* @memberOf _
* @since 1.1.0
* @category String
* @param {string} string The string to convert.
* @param {number} [radix=10] The radix to interpret `value` by.
* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
* @returns {number} Returns the converted integer.
* @example
*
* _.parseInt('08');
* // => 8
*
* _.map(['6', '08', '10'], _.parseInt);
* // => [6, 8, 10]
*/
function parseInt(string, radix, guard) {
if (guard || radix == null) {
radix = 0;
} else if (radix) {
radix = +radix;
}
return nativeParseInt(toString(string).replace(reTrimStart, ''), radix || 0);
}
/**
* Repeats the given string `n` times.
*
* @static
* @memberOf _
* @since 3.0.0
* @category String
* @param {string} [string=''] The string to repeat.
* @param {number} [n=1] The number of times to repeat the string.
* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
* @returns {string} Returns the repeated string.
* @example
*
* _.repeat('*', 3);
* // => '***'
*
* _.repeat('abc', 2);
* // => 'abcabc'
*
* _.repeat('abc', 0);
* // => ''
*/
function repeat(string, n, guard) {
if ((guard ? isIterateeCall(string, n, guard) : n === undefined)) {
n = 1;
} else {
n = toInteger(n);
}
return baseRepeat(toString(string), n);
}
/**
* Replaces matches for `pattern` in `string` with `replacement`.
*
* **Note:** This method is based on
* [`String#replace`](https://mdn.io/String/replace).
*
* @static
* @memberOf _
* @since 4.0.0
* @category String
* @param {string} [string=''] The string to modify.
* @param {RegExp|string} pattern The pattern to replace.
* @param {Function|string} replacement The match replacement.
* @returns {string} Returns the modified string.
* @example
*
* _.replace('Hi Fred', 'Fred', 'Barney');
* // => 'Hi Barney'
*/
function replace() {
var args = arguments,
string = toString(args[0]);
return args.length < 3 ? string : string.replace(args[1], args[2]);
}
/**
* Converts `string` to
* [snake case](https://en.wikipedia.org/wiki/Snake_case).
*
* @static
* @memberOf _
* @since 3.0.0
* @category String
* @param {string} [string=''] The string to convert.
* @returns {string} Returns the snake cased string.
* @example
*
* _.snakeCase('Foo Bar');
* // => 'foo_bar'
*
* _.snakeCase('fooBar');
* // => 'foo_bar'
*
* _.snakeCase('--FOO-BAR--');
* // => 'foo_bar'
*/
var snakeCase = createCompounder(function(result, word, index) {
return result + (index ? '_' : '') + word.toLowerCase();
});
/**
* Splits `string` by `separator`.
*
* **Note:** This method is based on
* [`String#split`](https://mdn.io/String/split).
*
* @static
* @memberOf _
* @since 4.0.0
* @category String
* @param {string} [string=''] The string to split.
* @param {RegExp|string} separator The separator pattern to split by.
* @param {number} [limit] The length to truncate results to.
* @returns {Array} Returns the string segments.
* @example
*
* _.split('a-b-c', '-', 2);
* // => ['a', 'b']
*/
function split(string, separator, limit) {
if (limit && typeof limit != 'number' && isIterateeCall(string, separator, limit)) {
separator = limit = undefined;
}
limit = limit === undefined ? MAX_ARRAY_LENGTH : limit >>> 0;
if (!limit) {
return [];
}
string = toString(string);
if (string && (
typeof separator == 'string' ||
(separator != null && !isRegExp(separator))
)) {
separator = baseToString(separator);
if (!separator && hasUnicode(string)) {
return castSlice(stringToArray(string), 0, limit);
}
}
return string.split(separator, limit);
}
/**
* Converts `string` to
* [start case](https://en.wikipedia.org/wiki/Letter_case#Stylistic_or_specialised_usage).
*
* @static
* @memberOf _
* @since 3.1.0
* @category String
* @param {string} [string=''] The string to convert.
* @returns {string} Returns the start cased string.
* @example
*
* _.startCase('--foo-bar--');
* // => 'Foo Bar'
*
* _.startCase('fooBar');
* // => 'Foo Bar'
*
* _.startCase('__FOO_BAR__');
* // => 'FOO BAR'
*/
var startCase = createCompounder(function(result, word, index) {
return result + (index ? ' ' : '') + upperFirst(word);
});
/**
* Checks if `string` starts with the given target string.
*
* @static
* @memberOf _
* @since 3.0.0
* @category String
* @param {string} [string=''] The string to inspect.
* @param {string} [target] The string to search for.
* @param {number} [position=0] The position to search from.
* @returns {boolean} Returns `true` if `string` starts with `target`,
* else `false`.
* @example
*
* _.startsWith('abc', 'a');
* // => true
*
* _.startsWith('abc', 'b');
* // => false
*
* _.startsWith('abc', 'b', 1);
* // => true
*/
function startsWith(string, target, position) {
string = toString(string);
position = baseClamp(toInteger(position), 0, string.length);
target = baseToString(target);
return string.slice(position, position + target.length) == target;
}
/**
* Creates a compiled template function that can interpolate data properties
* in "interpolate" delimiters, HTML-escape interpolated data properties in
* "escape" delimiters, and execute JavaScript in "evaluate" delimiters. Data
* properties may be accessed as free variables in the template. If a setting
* object is given, it takes precedence over `_.templateSettings` values.
*
* **Note:** In the development build `_.template` utilizes
* [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)
* for easier debugging.
*
* For more information on precompiling templates see
* [lodash's custom builds documentation](https://lodash.com/custom-builds).
*
* For more information on Chrome extension sandboxes see
* [Chrome's extensions documentation](https://developer.chrome.com/extensions/sandboxingEval).
*
* @static
* @since 0.1.0
* @memberOf _
* @category String
* @param {string} [string=''] The template string.
* @param {Object} [options={}] The options object.
* @param {RegExp} [options.escape=_.templateSettings.escape]
* The HTML "escape" delimiter.
* @param {RegExp} [options.evaluate=_.templateSettings.evaluate]
* The "evaluate" delimiter.
* @param {Object} [options.imports=_.templateSettings.imports]
* An object to import into the template as free variables.
* @param {RegExp} [options.interpolate=_.templateSettings.interpolate]
* The "interpolate" delimiter.
* @param {string} [options.sourceURL='lodash.templateSources[n]']
* The sourceURL of the compiled template.
* @param {string} [options.variable='obj']
* The data object variable name.
* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
* @returns {Function} Returns the compiled template function.
* @example
*
* // Use the "interpolate" delimiter to create a compiled template.
* var compiled = _.template('hello <%= user %>!');
* compiled({ 'user': 'fred' });
* // => 'hello fred!'
*
* // Use the HTML "escape" delimiter to escape data property values.
* var compiled = _.template('<b><%- value %></b>');
* compiled({ 'value': '<script>' });
* // => '<b>&lt;script&gt;</b>'
*
* // Use the "evaluate" delimiter to execute JavaScript and generate HTML.
* var compiled = _.template('<% _.forEach(users, function(user) { %><li><%- user %></li><% }); %>');
* compiled({ 'users': ['fred', 'barney'] });
* // => '<li>fred</li><li>barney</li>'
*
* // Use the internal `print` function in "evaluate" delimiters.
* var compiled = _.template('<% print("hello " + user); %>!');
* compiled({ 'user': 'barney' });
* // => 'hello barney!'
*
* // Use the ES template literal delimiter as an "interpolate" delimiter.
* // Disable support by replacing the "interpolate" delimiter.
* var compiled = _.template('hello ${ user }!');
* compiled({ 'user': 'pebbles' });
* // => 'hello pebbles!'
*
* // Use backslashes to treat delimiters as plain text.
* var compiled = _.template('<%= "\\<%- value %\\>" %>');
* compiled({ 'value': 'ignored' });
* // => '<%- value %>'
*
* // Use the `imports` option to import `jQuery` as `jq`.
* var text = '<% jq.each(users, function(user) { %><li><%- user %></li><% }); %>';
* var compiled = _.template(text, { 'imports': { 'jq': jQuery } });
* compiled({ 'users': ['fred', 'barney'] });
* // => '<li>fred</li><li>barney</li>'
*
* // Use the `sourceURL` option to specify a custom sourceURL for the template.
* var compiled = _.template('hello <%= user %>!', { 'sourceURL': '/basic/greeting.jst' });
* compiled(data);
* // => Find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector.
*
* // Use the `variable` option to ensure a with-statement isn't used in the compiled template.
* var compiled = _.template('hi <%= data.user %>!', { 'variable': 'data' });
* compiled.source;
* // => function(data) {
* // var __t, __p = '';
* // __p += 'hi ' + ((__t = ( data.user )) == null ? '' : __t) + '!';
* // return __p;
* // }
*
* // Use custom template delimiters.
* _.templateSettings.interpolate = /{{([\s\S]+?)}}/g;
* var compiled = _.template('hello {{ user }}!');
* compiled({ 'user': 'mustache' });
* // => 'hello mustache!'
*
* // Use the `source` property to inline compiled templates for meaningful
* // line numbers in error messages and stack traces.
* fs.writeFileSync(path.join(process.cwd(), 'jst.js'), '\
* var JST = {\
* "main": ' + _.template(mainText).source + '\
* };\
* ');
*/
function template(string, options, guard) {
// Based on John Resig's `tmpl` implementation
// (http://ejohn.org/blog/javascript-micro-templating/)
// and Laura Doktorova's doT.js (https://github.com/olado/doT).
var settings = lodash.templateSettings;
if (guard && isIterateeCall(string, options, guard)) {
options = undefined;
}
string = toString(string);
options = assignInWith({}, options, settings, assignInDefaults);
var imports = assignInWith({}, options.imports, settings.imports, assignInDefaults),
importsKeys = keys(imports),
importsValues = baseValues(imports, importsKeys);
var isEscaping,
isEvaluating,
index = 0,
interpolate = options.interpolate || reNoMatch,
source = "__p += '";
// Compile the regexp to match each delimiter.
var reDelimiters = RegExp(
(options.escape || reNoMatch).source + '|' +
interpolate.source + '|' +
(interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' +
(options.evaluate || reNoMatch).source + '|$'
, 'g');
// Use a sourceURL for easier debugging.
var sourceURL = '//# sourceURL=' +
('sourceURL' in options
? options.sourceURL
: ('lodash.templateSources[' + (++templateCounter) + ']')
) + '\n';
string.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {
interpolateValue || (interpolateValue = esTemplateValue);
// Escape characters that can't be included in string literals.
source += string.slice(index, offset).replace(reUnescapedString, escapeStringChar);
// Replace delimiters with snippets.
if (escapeValue) {
isEscaping = true;
source += "' +\n__e(" + escapeValue + ") +\n'";
}
if (evaluateValue) {
isEvaluating = true;
source += "';\n" + evaluateValue + ";\n__p += '";
}
if (interpolateValue) {
source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'";
}
index = offset + match.length;
// The JS engine embedded in Adobe products needs `match` returned in
// order to produce the correct `offset` value.
return match;
});
source += "';\n";
// If `variable` is not specified wrap a with-statement around the generated
// code to add the data object to the top of the scope chain.
var variable = options.variable;
if (!variable) {
source = 'with (obj) {\n' + source + '\n}\n';
}
// Cleanup code by stripping empty strings.
source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source)
.replace(reEmptyStringMiddle, '$1')
.replace(reEmptyStringTrailing, '$1;');
// Frame code as the function body.
source = 'function(' + (variable || 'obj') + ') {\n' +
(variable
? ''
: 'obj || (obj = {});\n'
) +
"var __t, __p = ''" +
(isEscaping
? ', __e = _.escape'
: ''
) +
(isEvaluating
? ', __j = Array.prototype.join;\n' +
"function print() { __p += __j.call(arguments, '') }\n"
: ';\n'
) +
source +
'return __p\n}';
var result = attempt(function() {
return Function(importsKeys, sourceURL + 'return ' + source)
.apply(undefined, importsValues);
});
// Provide the compiled function's source by its `toString` method or
// the `source` property as a convenience for inlining compiled templates.
result.source = source;
if (isError(result)) {
throw result;
}
return result;
}
/**
* Converts `string`, as a whole, to lower case just like
* [String#toLowerCase](https://mdn.io/toLowerCase).
*
* @static
* @memberOf _
* @since 4.0.0
* @category String
* @param {string} [string=''] The string to convert.
* @returns {string} Returns the lower cased string.
* @example
*
* _.toLower('--Foo-Bar--');
* // => '--foo-bar--'
*
* _.toLower('fooBar');
* // => 'foobar'
*
* _.toLower('__FOO_BAR__');
* // => '__foo_bar__'
*/
function toLower(value) {
return toString(value).toLowerCase();
}
/**
* Converts `string`, as a whole, to upper case just like
* [String#toUpperCase](https://mdn.io/toUpperCase).
*
* @static
* @memberOf _
* @since 4.0.0
* @category String
* @param {string} [string=''] The string to convert.
* @returns {string} Returns the upper cased string.
* @example
*
* _.toUpper('--foo-bar--');
* // => '--FOO-BAR--'
*
* _.toUpper('fooBar');
* // => 'FOOBAR'
*
* _.toUpper('__foo_bar__');
* // => '__FOO_BAR__'
*/
function toUpper(value) {
return toString(value).toUpperCase();
}
/**
* Removes leading and trailing whitespace or specified characters from `string`.
*
* @static
* @memberOf _
* @since 3.0.0
* @category String
* @param {string} [string=''] The string to trim.
* @param {string} [chars=whitespace] The characters to trim.
* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
* @returns {string} Returns the trimmed string.
* @example
*
* _.trim(' abc ');
* // => 'abc'
*
* _.trim('-_-abc-_-', '_-');
* // => 'abc'
*
* _.map([' foo ', ' bar '], _.trim);
* // => ['foo', 'bar']
*/
function trim(string, chars, guard) {
string = toString(string);
if (string && (guard || chars === undefined)) {
return string.replace(reTrim, '');
}
if (!string || !(chars = baseToString(chars))) {
return string;
}
var strSymbols = stringToArray(string),
chrSymbols = stringToArray(chars),
start = charsStartIndex(strSymbols, chrSymbols),
end = charsEndIndex(strSymbols, chrSymbols) + 1;
return castSlice(strSymbols, start, end).join('');
}
/**
* Removes trailing whitespace or specified characters from `string`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category String
* @param {string} [string=''] The string to trim.
* @param {string} [chars=whitespace] The characters to trim.
* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
* @returns {string} Returns the trimmed string.
* @example
*
* _.trimEnd(' abc ');
* // => ' abc'
*
* _.trimEnd('-_-abc-_-', '_-');
* // => '-_-abc'
*/
function trimEnd(string, chars, guard) {
string = toString(string);
if (string && (guard || chars === undefined)) {
return string.replace(reTrimEnd, '');
}
if (!string || !(chars = baseToString(chars))) {
return string;
}
var strSymbols = stringToArray(string),
end = charsEndIndex(strSymbols, stringToArray(chars)) + 1;
return castSlice(strSymbols, 0, end).join('');
}
/**
* Removes leading whitespace or specified characters from `string`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category String
* @param {string} [string=''] The string to trim.
* @param {string} [chars=whitespace] The characters to trim.
* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
* @returns {string} Returns the trimmed string.
* @example
*
* _.trimStart(' abc ');
* // => 'abc '
*
* _.trimStart('-_-abc-_-', '_-');
* // => 'abc-_-'
*/
function trimStart(string, chars, guard) {
string = toString(string);
if (string && (guard || chars === undefined)) {
return string.replace(reTrimStart, '');
}
if (!string || !(chars = baseToString(chars))) {
return string;
}
var strSymbols = stringToArray(string),
start = charsStartIndex(strSymbols, stringToArray(chars));
return castSlice(strSymbols, start).join('');
}
/**
* Truncates `string` if it's longer than the given maximum string length.
* The last characters of the truncated string are replaced with the omission
* string which defaults to "...".
*
* @static
* @memberOf _
* @since 4.0.0
* @category String
* @param {string} [string=''] The string to truncate.
* @param {Object} [options={}] The options object.
* @param {number} [options.length=30] The maximum string length.
* @param {string} [options.omission='...'] The string to indicate text is omitted.
* @param {RegExp|string} [options.separator] The separator pattern to truncate to.
* @returns {string} Returns the truncated string.
* @example
*
* _.truncate('hi-diddly-ho there, neighborino');
* // => 'hi-diddly-ho there, neighbo...'
*
* _.truncate('hi-diddly-ho there, neighborino', {
* 'length': 24,
* 'separator': ' '
* });
* // => 'hi-diddly-ho there,...'
*
* _.truncate('hi-diddly-ho there, neighborino', {
* 'length': 24,
* 'separator': /,? +/
* });
* // => 'hi-diddly-ho there...'
*
* _.truncate('hi-diddly-ho there, neighborino', {
* 'omission': ' [...]'
* });
* // => 'hi-diddly-ho there, neig [...]'
*/
function truncate(string, options) {
var length = DEFAULT_TRUNC_LENGTH,
omission = DEFAULT_TRUNC_OMISSION;
if (isObject(options)) {
var separator = 'separator' in options ? options.separator : separator;
length = 'length' in options ? toInteger(options.length) : length;
omission = 'omission' in options ? baseToString(options.omission) : omission;
}
string = toString(string);
var strLength = string.length;
if (hasUnicode(string)) {
var strSymbols = stringToArray(string);
strLength = strSymbols.length;
}
if (length >= strLength) {
return string;
}
var end = length - stringSize(omission);
if (end < 1) {
return omission;
}
var result = strSymbols
? castSlice(strSymbols, 0, end).join('')
: string.slice(0, end);
if (separator === undefined) {
return result + omission;
}
if (strSymbols) {
end += (result.length - end);
}
if (isRegExp(separator)) {
if (string.slice(end).search(separator)) {
var match,
substring = result;
if (!separator.global) {
separator = RegExp(separator.source, toString(reFlags.exec(separator)) + 'g');
}
separator.lastIndex = 0;
while ((match = separator.exec(substring))) {
var newEnd = match.index;
}
result = result.slice(0, newEnd === undefined ? end : newEnd);
}
} else if (string.indexOf(baseToString(separator), end) != end) {
var index = result.lastIndexOf(separator);
if (index > -1) {
result = result.slice(0, index);
}
}
return result + omission;
}
/**
* The inverse of `_.escape`; this method converts the HTML entities
* `&amp;`, `&lt;`, `&gt;`, `&quot;`, and `&#39;` in `string` to
* their corresponding characters.
*
* **Note:** No other HTML entities are unescaped. To unescape additional
* HTML entities use a third-party library like [_he_](https://mths.be/he).
*
* @static
* @memberOf _
* @since 0.6.0
* @category String
* @param {string} [string=''] The string to unescape.
* @returns {string} Returns the unescaped string.
* @example
*
* _.unescape('fred, barney, &amp; pebbles');
* // => 'fred, barney, & pebbles'
*/
function unescape(string) {
string = toString(string);
return (string && reHasEscapedHtml.test(string))
? string.replace(reEscapedHtml, unescapeHtmlChar)
: string;
}
/**
* Converts `string`, as space separated words, to upper case.
*
* @static
* @memberOf _
* @since 4.0.0
* @category String
* @param {string} [string=''] The string to convert.
* @returns {string} Returns the upper cased string.
* @example
*
* _.upperCase('--foo-bar');
* // => 'FOO BAR'
*
* _.upperCase('fooBar');
* // => 'FOO BAR'
*
* _.upperCase('__foo_bar__');
* // => 'FOO BAR'
*/
var upperCase = createCompounder(function(result, word, index) {
return result + (index ? ' ' : '') + word.toUpperCase();
});
/**
* Converts the first character of `string` to upper case.
*
* @static
* @memberOf _
* @since 4.0.0
* @category String
* @param {string} [string=''] The string to convert.
* @returns {string} Returns the converted string.
* @example
*
* _.upperFirst('fred');
* // => 'Fred'
*
* _.upperFirst('FRED');
* // => 'FRED'
*/
var upperFirst = createCaseFirst('toUpperCase');
/**
* Splits `string` into an array of its words.
*
* @static
* @memberOf _
* @since 3.0.0
* @category String
* @param {string} [string=''] The string to inspect.
* @param {RegExp|string} [pattern] The pattern to match words.
* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
* @returns {Array} Returns the words of `string`.
* @example
*
* _.words('fred, barney, & pebbles');
* // => ['fred', 'barney', 'pebbles']
*
* _.words('fred, barney, & pebbles', /[^, ]+/g);
* // => ['fred', 'barney', '&', 'pebbles']
*/
function words(string, pattern, guard) {
string = toString(string);
pattern = guard ? undefined : pattern;
if (pattern === undefined) {
return hasUnicodeWord(string) ? unicodeWords(string) : asciiWords(string);
}
return string.match(pattern) || [];
}
/*------------------------------------------------------------------------*/
/**
* Attempts to invoke `func`, returning either the result or the caught error
* object. Any additional arguments are provided to `func` when it's invoked.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Util
* @param {Function} func The function to attempt.
* @param {...*} [args] The arguments to invoke `func` with.
* @returns {*} Returns the `func` result or error object.
* @example
*
* // Avoid throwing errors for invalid selectors.
* var elements = _.attempt(function(selector) {
* return document.querySelectorAll(selector);
* }, '>_>');
*
* if (_.isError(elements)) {
* elements = [];
* }
*/
var attempt = baseRest(function(func, args) {
try {
return apply(func, undefined, args);
} catch (e) {
return isError(e) ? e : new Error(e);
}
});
/**
* Binds methods of an object to the object itself, overwriting the existing
* method.
*
* **Note:** This method doesn't set the "length" property of bound functions.
*
* @static
* @since 0.1.0
* @memberOf _
* @category Util
* @param {Object} object The object to bind and assign the bound methods to.
* @param {...(string|string[])} methodNames The object method names to bind.
* @returns {Object} Returns `object`.
* @example
*
* var view = {
* 'label': 'docs',
* 'click': function() {
* console.log('clicked ' + this.label);
* }
* };
*
* _.bindAll(view, ['click']);
* jQuery(element).on('click', view.click);
* // => Logs 'clicked docs' when clicked.
*/
var bindAll = flatRest(function(object, methodNames) {
arrayEach(methodNames, function(key) {
key = toKey(key);
baseAssignValue(object, key, bind(object[key], object));
});
return object;
});
/**
* Creates a function that iterates over `pairs` and invokes the corresponding
* function of the first predicate to return truthy. The predicate-function
* pairs are invoked with the `this` binding and arguments of the created
* function.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Util
* @param {Array} pairs The predicate-function pairs.
* @returns {Function} Returns the new composite function.
* @example
*
* var func = _.cond([
* [_.matches({ 'a': 1 }), _.constant('matches A')],
* [_.conforms({ 'b': _.isNumber }), _.constant('matches B')],
* [_.stubTrue, _.constant('no match')]
* ]);
*
* func({ 'a': 1, 'b': 2 });
* // => 'matches A'
*
* func({ 'a': 0, 'b': 1 });
* // => 'matches B'
*
* func({ 'a': '1', 'b': '2' });
* // => 'no match'
*/
function cond(pairs) {
var length = pairs == null ? 0 : pairs.length,
toIteratee = getIteratee();
pairs = !length ? [] : arrayMap(pairs, function(pair) {
if (typeof pair[1] != 'function') {
throw new TypeError(FUNC_ERROR_TEXT);
}
return [toIteratee(pair[0]), pair[1]];
});
return baseRest(function(args) {
var index = -1;
while (++index < length) {
var pair = pairs[index];
if (apply(pair[0], this, args)) {
return apply(pair[1], this, args);
}
}
});
}
/**
* Creates a function that invokes the predicate properties of `source` with
* the corresponding property values of a given object, returning `true` if
* all predicates return truthy, else `false`.
*
* **Note:** The created function is equivalent to `_.conformsTo` with
* `source` partially applied.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Util
* @param {Object} source The object of property predicates to conform to.
* @returns {Function} Returns the new spec function.
* @example
*
* var objects = [
* { 'a': 2, 'b': 1 },
* { 'a': 1, 'b': 2 }
* ];
*
* _.filter(objects, _.conforms({ 'b': function(n) { return n > 1; } }));
* // => [{ 'a': 1, 'b': 2 }]
*/
function conforms(source) {
return baseConforms(baseClone(source, true));
}
/**
* Creates a function that returns `value`.
*
* @static
* @memberOf _
* @since 2.4.0
* @category Util
* @param {*} value The value to return from the new function.
* @returns {Function} Returns the new constant function.
* @example
*
* var objects = _.times(2, _.constant({ 'a': 1 }));
*
* console.log(objects);
* // => [{ 'a': 1 }, { 'a': 1 }]
*
* console.log(objects[0] === objects[1]);
* // => true
*/
function constant(value) {
return function() {
return value;
};
}
/**
* Checks `value` to determine whether a default value should be returned in
* its place. The `defaultValue` is returned if `value` is `NaN`, `null`,
* or `undefined`.
*
* @static
* @memberOf _
* @since 4.14.0
* @category Util
* @param {*} value The value to check.
* @param {*} defaultValue The default value.
* @returns {*} Returns the resolved value.
* @example
*
* _.defaultTo(1, 10);
* // => 1
*
* _.defaultTo(undefined, 10);
* // => 10
*/
function defaultTo(value, defaultValue) {
return (value == null || value !== value) ? defaultValue : value;
}
/**
* Creates a function that returns the result of invoking the given functions
* with the `this` binding of the created function, where each successive
* invocation is supplied the return value of the previous.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Util
* @param {...(Function|Function[])} [funcs] The functions to invoke.
* @returns {Function} Returns the new composite function.
* @see _.flowRight
* @example
*
* function square(n) {
* return n * n;
* }
*
* var addSquare = _.flow([_.add, square]);
* addSquare(1, 2);
* // => 9
*/
var flow = createFlow();
/**
* This method is like `_.flow` except that it creates a function that
* invokes the given functions from right to left.
*
* @static
* @since 3.0.0
* @memberOf _
* @category Util
* @param {...(Function|Function[])} [funcs] The functions to invoke.
* @returns {Function} Returns the new composite function.
* @see _.flow
* @example
*
* function square(n) {
* return n * n;
* }
*
* var addSquare = _.flowRight([square, _.add]);
* addSquare(1, 2);
* // => 9
*/
var flowRight = createFlow(true);
/**
* This method returns the first argument it receives.
*
* @static
* @since 0.1.0
* @memberOf _
* @category Util
* @param {*} value Any value.
* @returns {*} Returns `value`.
* @example
*
* var object = { 'a': 1 };
*
* console.log(_.identity(object) === object);
* // => true
*/
function identity(value) {
return value;
}
/**
* Creates a function that invokes `func` with the arguments of the created
* function. If `func` is a property name, the created function returns the
* property value for a given element. If `func` is an array or object, the
* created function returns `true` for elements that contain the equivalent
* source properties, otherwise it returns `false`.
*
* @static
* @since 4.0.0
* @memberOf _
* @category Util
* @param {*} [func=_.identity] The value to convert to a callback.
* @returns {Function} Returns the callback.
* @example
*
* var users = [
* { 'user': 'barney', 'age': 36, 'active': true },
* { 'user': 'fred', 'age': 40, 'active': false }
* ];
*
* // The `_.matches` iteratee shorthand.
* _.filter(users, _.iteratee({ 'user': 'barney', 'active': true }));
* // => [{ 'user': 'barney', 'age': 36, 'active': true }]
*
* // The `_.matchesProperty` iteratee shorthand.
* _.filter(users, _.iteratee(['user', 'fred']));
* // => [{ 'user': 'fred', 'age': 40 }]
*
* // The `_.property` iteratee shorthand.
* _.map(users, _.iteratee('user'));
* // => ['barney', 'fred']
*
* // Create custom iteratee shorthands.
* _.iteratee = _.wrap(_.iteratee, function(iteratee, func) {
* return !_.isRegExp(func) ? iteratee(func) : function(string) {
* return func.test(string);
* };
* });
*
* _.filter(['abc', 'def'], /ef/);
* // => ['def']
*/
function iteratee(func) {
return baseIteratee(typeof func == 'function' ? func : baseClone(func, true));
}
/**
* Creates a function that performs a partial deep comparison between a given
* object and `source`, returning `true` if the given object has equivalent
* property values, else `false`.
*
* **Note:** The created function is equivalent to `_.isMatch` with `source`
* partially applied.
*
* Partial comparisons will match empty array and empty object `source`
* values against any array or object value, respectively. See `_.isEqual`
* for a list of supported value comparisons.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Util
* @param {Object} source The object of property values to match.
* @returns {Function} Returns the new spec function.
* @example
*
* var objects = [
* { 'a': 1, 'b': 2, 'c': 3 },
* { 'a': 4, 'b': 5, 'c': 6 }
* ];
*
* _.filter(objects, _.matches({ 'a': 4, 'c': 6 }));
* // => [{ 'a': 4, 'b': 5, 'c': 6 }]
*/
function matches(source) {
return baseMatches(baseClone(source, true));
}
/**
* Creates a function that performs a partial deep comparison between the
* value at `path` of a given object to `srcValue`, returning `true` if the
* object value is equivalent, else `false`.
*
* **Note:** Partial comparisons will match empty array and empty object
* `srcValue` values against any array or object value, respectively. See
* `_.isEqual` for a list of supported value comparisons.
*
* @static
* @memberOf _
* @since 3.2.0
* @category Util
* @param {Array|string} path The path of the property to get.
* @param {*} srcValue The value to match.
* @returns {Function} Returns the new spec function.
* @example
*
* var objects = [
* { 'a': 1, 'b': 2, 'c': 3 },
* { 'a': 4, 'b': 5, 'c': 6 }
* ];
*
* _.find(objects, _.matchesProperty('a', 4));
* // => { 'a': 4, 'b': 5, 'c': 6 }
*/
function matchesProperty(path, srcValue) {
return baseMatchesProperty(path, baseClone(srcValue, true));
}
/**
* Creates a function that invokes the method at `path` of a given object.
* Any additional arguments are provided to the invoked method.
*
* @static
* @memberOf _
* @since 3.7.0
* @category Util
* @param {Array|string} path The path of the method to invoke.
* @param {...*} [args] The arguments to invoke the method with.
* @returns {Function} Returns the new invoker function.
* @example
*
* var objects = [
* { 'a': { 'b': _.constant(2) } },
* { 'a': { 'b': _.constant(1) } }
* ];
*
* _.map(objects, _.method('a.b'));
* // => [2, 1]
*
* _.map(objects, _.method(['a', 'b']));
* // => [2, 1]
*/
var method = baseRest(function(path, args) {
return function(object) {
return baseInvoke(object, path, args);
};
});
/**
* The opposite of `_.method`; this method creates a function that invokes
* the method at a given path of `object`. Any additional arguments are
* provided to the invoked method.
*
* @static
* @memberOf _
* @since 3.7.0
* @category Util
* @param {Object} object The object to query.
* @param {...*} [args] The arguments to invoke the method with.
* @returns {Function} Returns the new invoker function.
* @example
*
* var array = _.times(3, _.constant),
* object = { 'a': array, 'b': array, 'c': array };
*
* _.map(['a[2]', 'c[0]'], _.methodOf(object));
* // => [2, 0]
*
* _.map([['a', '2'], ['c', '0']], _.methodOf(object));
* // => [2, 0]
*/
var methodOf = baseRest(function(object, args) {
return function(path) {
return baseInvoke(object, path, args);
};
});
/**
* Adds all own enumerable string keyed function properties of a source
* object to the destination object. If `object` is a function, then methods
* are added to its prototype as well.
*
* **Note:** Use `_.runInContext` to create a pristine `lodash` function to
* avoid conflicts caused by modifying the original.
*
* @static
* @since 0.1.0
* @memberOf _
* @category Util
* @param {Function|Object} [object=lodash] The destination object.
* @param {Object} source The object of functions to add.
* @param {Object} [options={}] The options object.
* @param {boolean} [options.chain=true] Specify whether mixins are chainable.
* @returns {Function|Object} Returns `object`.
* @example
*
* function vowels(string) {
* return _.filter(string, function(v) {
* return /[aeiou]/i.test(v);
* });
* }
*
* _.mixin({ 'vowels': vowels });
* _.vowels('fred');
* // => ['e']
*
* _('fred').vowels().value();
* // => ['e']
*
* _.mixin({ 'vowels': vowels }, { 'chain': false });
* _('fred').vowels();
* // => ['e']
*/
function mixin(object, source, options) {
var props = keys(source),
methodNames = baseFunctions(source, props);
if (options == null &&
!(isObject(source) && (methodNames.length || !props.length))) {
options = source;
source = object;
object = this;
methodNames = baseFunctions(source, keys(source));
}
var chain = !(isObject(options) && 'chain' in options) || !!options.chain,
isFunc = isFunction(object);
arrayEach(methodNames, function(methodName) {
var func = source[methodName];
object[methodName] = func;
if (isFunc) {
object.prototype[methodName] = function() {
var chainAll = this.__chain__;
if (chain || chainAll) {
var result = object(this.__wrapped__),
actions = result.__actions__ = copyArray(this.__actions__);
actions.push({ 'func': func, 'args': arguments, 'thisArg': object });
result.__chain__ = chainAll;
return result;
}
return func.apply(object, arrayPush([this.value()], arguments));
};
}
});
return object;
}
/**
* Reverts the `_` variable to its previous value and returns a reference to
* the `lodash` function.
*
* @static
* @since 0.1.0
* @memberOf _
* @category Util
* @returns {Function} Returns the `lodash` function.
* @example
*
* var lodash = _.noConflict();
*/
function noConflict() {
if (root._ === this) {
root._ = oldDash;
}
return this;
}
/**
* This method returns `undefined`.
*
* @static
* @memberOf _
* @since 2.3.0
* @category Util
* @example
*
* _.times(2, _.noop);
* // => [undefined, undefined]
*/
function noop() {
// No operation performed.
}
/**
* Creates a function that gets the argument at index `n`. If `n` is negative,
* the nth argument from the end is returned.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Util
* @param {number} [n=0] The index of the argument to return.
* @returns {Function} Returns the new pass-thru function.
* @example
*
* var func = _.nthArg(1);
* func('a', 'b', 'c', 'd');
* // => 'b'
*
* var func = _.nthArg(-2);
* func('a', 'b', 'c', 'd');
* // => 'c'
*/
function nthArg(n) {
n = toInteger(n);
return baseRest(function(args) {
return baseNth(args, n);
});
}
/**
* Creates a function that invokes `iteratees` with the arguments it receives
* and returns their results.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Util
* @param {...(Function|Function[])} [iteratees=[_.identity]]
* The iteratees to invoke.
* @returns {Function} Returns the new function.
* @example
*
* var func = _.over([Math.max, Math.min]);
*
* func(1, 2, 3, 4);
* // => [4, 1]
*/
var over = createOver(arrayMap);
/**
* Creates a function that checks if **all** of the `predicates` return
* truthy when invoked with the arguments it receives.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Util
* @param {...(Function|Function[])} [predicates=[_.identity]]
* The predicates to check.
* @returns {Function} Returns the new function.
* @example
*
* var func = _.overEvery([Boolean, isFinite]);
*
* func('1');
* // => true
*
* func(null);
* // => false
*
* func(NaN);
* // => false
*/
var overEvery = createOver(arrayEvery);
/**
* Creates a function that checks if **any** of the `predicates` return
* truthy when invoked with the arguments it receives.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Util
* @param {...(Function|Function[])} [predicates=[_.identity]]
* The predicates to check.
* @returns {Function} Returns the new function.
* @example
*
* var func = _.overSome([Boolean, isFinite]);
*
* func('1');
* // => true
*
* func(null);
* // => true
*
* func(NaN);
* // => false
*/
var overSome = createOver(arraySome);
/**
* Creates a function that returns the value at `path` of a given object.
*
* @static
* @memberOf _
* @since 2.4.0
* @category Util
* @param {Array|string} path The path of the property to get.
* @returns {Function} Returns the new accessor function.
* @example
*
* var objects = [
* { 'a': { 'b': 2 } },
* { 'a': { 'b': 1 } }
* ];
*
* _.map(objects, _.property('a.b'));
* // => [2, 1]
*
* _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
* // => [1, 2]
*/
function property(path) {
return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
}
/**
* The opposite of `_.property`; this method creates a function that returns
* the value at a given path of `object`.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Util
* @param {Object} object The object to query.
* @returns {Function} Returns the new accessor function.
* @example
*
* var array = [0, 1, 2],
* object = { 'a': array, 'b': array, 'c': array };
*
* _.map(['a[2]', 'c[0]'], _.propertyOf(object));
* // => [2, 0]
*
* _.map([['a', '2'], ['c', '0']], _.propertyOf(object));
* // => [2, 0]
*/
function propertyOf(object) {
return function(path) {
return object == null ? undefined : baseGet(object, path);
};
}
/**
* Creates an array of numbers (positive and/or negative) progressing from
* `start` up to, but not including, `end`. A step of `-1` is used if a negative
* `start` is specified without an `end` or `step`. If `end` is not specified,
* it's set to `start` with `start` then set to `0`.
*
* **Note:** JavaScript follows the IEEE-754 standard for resolving
* floating-point values which can produce unexpected results.
*
* @static
* @since 0.1.0
* @memberOf _
* @category Util
* @param {number} [start=0] The start of the range.
* @param {number} end The end of the range.
* @param {number} [step=1] The value to increment or decrement by.
* @returns {Array} Returns the range of numbers.
* @see _.inRange, _.rangeRight
* @example
*
* _.range(4);
* // => [0, 1, 2, 3]
*
* _.range(-4);
* // => [0, -1, -2, -3]
*
* _.range(1, 5);
* // => [1, 2, 3, 4]
*
* _.range(0, 20, 5);
* // => [0, 5, 10, 15]
*
* _.range(0, -4, -1);
* // => [0, -1, -2, -3]
*
* _.range(1, 4, 0);
* // => [1, 1, 1]
*
* _.range(0);
* // => []
*/
var range = createRange();
/**
* This method is like `_.range` except that it populates values in
* descending order.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Util
* @param {number} [start=0] The start of the range.
* @param {number} end The end of the range.
* @param {number} [step=1] The value to increment or decrement by.
* @returns {Array} Returns the range of numbers.
* @see _.inRange, _.range
* @example
*
* _.rangeRight(4);
* // => [3, 2, 1, 0]
*
* _.rangeRight(-4);
* // => [-3, -2, -1, 0]
*
* _.rangeRight(1, 5);
* // => [4, 3, 2, 1]
*
* _.rangeRight(0, 20, 5);
* // => [15, 10, 5, 0]
*
* _.rangeRight(0, -4, -1);
* // => [-3, -2, -1, 0]
*
* _.rangeRight(1, 4, 0);
* // => [1, 1, 1]
*
* _.rangeRight(0);
* // => []
*/
var rangeRight = createRange(true);
/**
* This method returns a new empty array.
*
* @static
* @memberOf _
* @since 4.13.0
* @category Util
* @returns {Array} Returns the new empty array.
* @example
*
* var arrays = _.times(2, _.stubArray);
*
* console.log(arrays);
* // => [[], []]
*
* console.log(arrays[0] === arrays[1]);
* // => false
*/
function stubArray() {
return [];
}
/**
* This method returns `false`.
*
* @static
* @memberOf _
* @since 4.13.0
* @category Util
* @returns {boolean} Returns `false`.
* @example
*
* _.times(2, _.stubFalse);
* // => [false, false]
*/
function stubFalse() {
return false;
}
/**
* This method returns a new empty object.
*
* @static
* @memberOf _
* @since 4.13.0
* @category Util
* @returns {Object} Returns the new empty object.
* @example
*
* var objects = _.times(2, _.stubObject);
*
* console.log(objects);
* // => [{}, {}]
*
* console.log(objects[0] === objects[1]);
* // => false
*/
function stubObject() {
return {};
}
/**
* This method returns an empty string.
*
* @static
* @memberOf _
* @since 4.13.0
* @category Util
* @returns {string} Returns the empty string.
* @example
*
* _.times(2, _.stubString);
* // => ['', '']
*/
function stubString() {
return '';
}
/**
* This method returns `true`.
*
* @static
* @memberOf _
* @since 4.13.0
* @category Util
* @returns {boolean} Returns `true`.
* @example
*
* _.times(2, _.stubTrue);
* // => [true, true]
*/
function stubTrue() {
return true;
}
/**
* Invokes the iteratee `n` times, returning an array of the results of
* each invocation. The iteratee is invoked with one argument; (index).
*
* @static
* @since 0.1.0
* @memberOf _
* @category Util
* @param {number} n The number of times to invoke `iteratee`.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @returns {Array} Returns the array of results.
* @example
*
* _.times(3, String);
* // => ['0', '1', '2']
*
* _.times(4, _.constant(0));
* // => [0, 0, 0, 0]
*/
function times(n, iteratee) {
n = toInteger(n);
if (n < 1 || n > MAX_SAFE_INTEGER) {
return [];
}
var index = MAX_ARRAY_LENGTH,
length = nativeMin(n, MAX_ARRAY_LENGTH);
iteratee = getIteratee(iteratee);
n -= MAX_ARRAY_LENGTH;
var result = baseTimes(length, iteratee);
while (++index < n) {
iteratee(index);
}
return result;
}
/**
* Converts `value` to a property path array.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Util
* @param {*} value The value to convert.
* @returns {Array} Returns the new property path array.
* @example
*
* _.toPath('a.b.c');
* // => ['a', 'b', 'c']
*
* _.toPath('a[0].b.c');
* // => ['a', '0', 'b', 'c']
*/
function toPath(value) {
if (isArray(value)) {
return arrayMap(value, toKey);
}
return isSymbol(value) ? [value] : copyArray(stringToPath(value));
}
/**
* Generates a unique ID. If `prefix` is given, the ID is appended to it.
*
* @static
* @since 0.1.0
* @memberOf _
* @category Util
* @param {string} [prefix=''] The value to prefix the ID with.
* @returns {string} Returns the unique ID.
* @example
*
* _.uniqueId('contact_');
* // => 'contact_104'
*
* _.uniqueId();
* // => '105'
*/
function uniqueId(prefix) {
var id = ++idCounter;
return toString(prefix) + id;
}
/*------------------------------------------------------------------------*/
/**
* Adds two numbers.
*
* @static
* @memberOf _
* @since 3.4.0
* @category Math
* @param {number} augend The first number in an addition.
* @param {number} addend The second number in an addition.
* @returns {number} Returns the total.
* @example
*
* _.add(6, 4);
* // => 10
*/
var add = createMathOperation(function(augend, addend) {
return augend + addend;
}, 0);
/**
* Computes `number` rounded up to `precision`.
*
* @static
* @memberOf _
* @since 3.10.0
* @category Math
* @param {number} number The number to round up.
* @param {number} [precision=0] The precision to round up to.
* @returns {number} Returns the rounded up number.
* @example
*
* _.ceil(4.006);
* // => 5
*
* _.ceil(6.004, 2);
* // => 6.01
*
* _.ceil(6040, -2);
* // => 6100
*/
var ceil = createRound('ceil');
/**
* Divide two numbers.
*
* @static
* @memberOf _
* @since 4.7.0
* @category Math
* @param {number} dividend The first number in a division.
* @param {number} divisor The second number in a division.
* @returns {number} Returns the quotient.
* @example
*
* _.divide(6, 4);
* // => 1.5
*/
var divide = createMathOperation(function(dividend, divisor) {
return dividend / divisor;
}, 1);
/**
* Computes `number` rounded down to `precision`.
*
* @static
* @memberOf _
* @since 3.10.0
* @category Math
* @param {number} number The number to round down.
* @param {number} [precision=0] The precision to round down to.
* @returns {number} Returns the rounded down number.
* @example
*
* _.floor(4.006);
* // => 4
*
* _.floor(0.046, 2);
* // => 0.04
*
* _.floor(4060, -2);
* // => 4000
*/
var floor = createRound('floor');
/**
* Computes the maximum value of `array`. If `array` is empty or falsey,
* `undefined` is returned.
*
* @static
* @since 0.1.0
* @memberOf _
* @category Math
* @param {Array} array The array to iterate over.
* @returns {*} Returns the maximum value.
* @example
*
* _.max([4, 2, 8, 6]);
* // => 8
*
* _.max([]);
* // => undefined
*/
function max(array) {
return (array && array.length)
? baseExtremum(array, identity, baseGt)
: undefined;
}
/**
* This method is like `_.max` except that it accepts `iteratee` which is
* invoked for each element in `array` to generate the criterion by which
* the value is ranked. The iteratee is invoked with one argument: (value).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Math
* @param {Array} array The array to iterate over.
* @param {Function} [iteratee=_.identity] The iteratee invoked per element.
* @returns {*} Returns the maximum value.
* @example
*
* var objects = [{ 'n': 1 }, { 'n': 2 }];
*
* _.maxBy(objects, function(o) { return o.n; });
* // => { 'n': 2 }
*
* // The `_.property` iteratee shorthand.
* _.maxBy(objects, 'n');
* // => { 'n': 2 }
*/
function maxBy(array, iteratee) {
return (array && array.length)
? baseExtremum(array, getIteratee(iteratee, 2), baseGt)
: undefined;
}
/**
* Computes the mean of the values in `array`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Math
* @param {Array} array The array to iterate over.
* @returns {number} Returns the mean.
* @example
*
* _.mean([4, 2, 8, 6]);
* // => 5
*/
function mean(array) {
return baseMean(array, identity);
}
/**
* This method is like `_.mean` except that it accepts `iteratee` which is
* invoked for each element in `array` to generate the value to be averaged.
* The iteratee is invoked with one argument: (value).
*
* @static
* @memberOf _
* @since 4.7.0
* @category Math
* @param {Array} array The array to iterate over.
* @param {Function} [iteratee=_.identity] The iteratee invoked per element.
* @returns {number} Returns the mean.
* @example
*
* var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
*
* _.meanBy(objects, function(o) { return o.n; });
* // => 5
*
* // The `_.property` iteratee shorthand.
* _.meanBy(objects, 'n');
* // => 5
*/
function meanBy(array, iteratee) {
return baseMean(array, getIteratee(iteratee, 2));
}
/**
* Computes the minimum value of `array`. If `array` is empty or falsey,
* `undefined` is returned.
*
* @static
* @since 0.1.0
* @memberOf _
* @category Math
* @param {Array} array The array to iterate over.
* @returns {*} Returns the minimum value.
* @example
*
* _.min([4, 2, 8, 6]);
* // => 2
*
* _.min([]);
* // => undefined
*/
function min(array) {
return (array && array.length)
? baseExtremum(array, identity, baseLt)
: undefined;
}
/**
* This method is like `_.min` except that it accepts `iteratee` which is
* invoked for each element in `array` to generate the criterion by which
* the value is ranked. The iteratee is invoked with one argument: (value).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Math
* @param {Array} array The array to iterate over.
* @param {Function} [iteratee=_.identity] The iteratee invoked per element.
* @returns {*} Returns the minimum value.
* @example
*
* var objects = [{ 'n': 1 }, { 'n': 2 }];
*
* _.minBy(objects, function(o) { return o.n; });
* // => { 'n': 1 }
*
* // The `_.property` iteratee shorthand.
* _.minBy(objects, 'n');
* // => { 'n': 1 }
*/
function minBy(array, iteratee) {
return (array && array.length)
? baseExtremum(array, getIteratee(iteratee, 2), baseLt)
: undefined;
}
/**
* Multiply two numbers.
*
* @static
* @memberOf _
* @since 4.7.0
* @category Math
* @param {number} multiplier The first number in a multiplication.
* @param {number} multiplicand The second number in a multiplication.
* @returns {number} Returns the product.
* @example
*
* _.multiply(6, 4);
* // => 24
*/
var multiply = createMathOperation(function(multiplier, multiplicand) {
return multiplier * multiplicand;
}, 1);
/**
* Computes `number` rounded to `precision`.
*
* @static
* @memberOf _
* @since 3.10.0
* @category Math
* @param {number} number The number to round.
* @param {number} [precision=0] The precision to round to.
* @returns {number} Returns the rounded number.
* @example
*
* _.round(4.006);
* // => 4
*
* _.round(4.006, 2);
* // => 4.01
*
* _.round(4060, -2);
* // => 4100
*/
var round = createRound('round');
/**
* Subtract two numbers.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Math
* @param {number} minuend The first number in a subtraction.
* @param {number} subtrahend The second number in a subtraction.
* @returns {number} Returns the difference.
* @example
*
* _.subtract(6, 4);
* // => 2
*/
var subtract = createMathOperation(function(minuend, subtrahend) {
return minuend - subtrahend;
}, 0);
/**
* Computes the sum of the values in `array`.
*
* @static
* @memberOf _
* @since 3.4.0
* @category Math
* @param {Array} array The array to iterate over.
* @returns {number} Returns the sum.
* @example
*
* _.sum([4, 2, 8, 6]);
* // => 20
*/
function sum(array) {
return (array && array.length)
? baseSum(array, identity)
: 0;
}
/**
* This method is like `_.sum` except that it accepts `iteratee` which is
* invoked for each element in `array` to generate the value to be summed.
* The iteratee is invoked with one argument: (value).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Math
* @param {Array} array The array to iterate over.
* @param {Function} [iteratee=_.identity] The iteratee invoked per element.
* @returns {number} Returns the sum.
* @example
*
* var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
*
* _.sumBy(objects, function(o) { return o.n; });
* // => 20
*
* // The `_.property` iteratee shorthand.
* _.sumBy(objects, 'n');
* // => 20
*/
function sumBy(array, iteratee) {
return (array && array.length)
? baseSum(array, getIteratee(iteratee, 2))
: 0;
}
/*------------------------------------------------------------------------*/
// Add methods that return wrapped values in chain sequences.
lodash.after = after;
lodash.ary = ary;
lodash.assign = assign;
lodash.assignIn = assignIn;
lodash.assignInWith = assignInWith;
lodash.assignWith = assignWith;
lodash.at = at;
lodash.before = before;
lodash.bind = bind;
lodash.bindAll = bindAll;
lodash.bindKey = bindKey;
lodash.castArray = castArray;
lodash.chain = chain;
lodash.chunk = chunk;
lodash.compact = compact;
lodash.concat = concat;
lodash.cond = cond;
lodash.conforms = conforms;
lodash.constant = constant;
lodash.countBy = countBy;
lodash.create = create;
lodash.curry = curry;
lodash.curryRight = curryRight;
lodash.debounce = debounce;
lodash.defaults = defaults;
lodash.defaultsDeep = defaultsDeep;
lodash.defer = defer;
lodash.delay = delay;
lodash.difference = difference;
lodash.differenceBy = differenceBy;
lodash.differenceWith = differenceWith;
lodash.drop = drop;
lodash.dropRight = dropRight;
lodash.dropRightWhile = dropRightWhile;
lodash.dropWhile = dropWhile;
lodash.fill = fill;
lodash.filter = filter;
lodash.flatMap = flatMap;
lodash.flatMapDeep = flatMapDeep;
lodash.flatMapDepth = flatMapDepth;
lodash.flatten = flatten;
lodash.flattenDeep = flattenDeep;
lodash.flattenDepth = flattenDepth;
lodash.flip = flip;
lodash.flow = flow;
lodash.flowRight = flowRight;
lodash.fromPairs = fromPairs;
lodash.functions = functions;
lodash.functionsIn = functionsIn;
lodash.groupBy = groupBy;
lodash.initial = initial;
lodash.intersection = intersection;
lodash.intersectionBy = intersectionBy;
lodash.intersectionWith = intersectionWith;
lodash.invert = invert;
lodash.invertBy = invertBy;
lodash.invokeMap = invokeMap;
lodash.iteratee = iteratee;
lodash.keyBy = keyBy;
lodash.keys = keys;
lodash.keysIn = keysIn;
lodash.map = map;
lodash.mapKeys = mapKeys;
lodash.mapValues = mapValues;
lodash.matches = matches;
lodash.matchesProperty = matchesProperty;
lodash.memoize = memoize;
lodash.merge = merge;
lodash.mergeWith = mergeWith;
lodash.method = method;
lodash.methodOf = methodOf;
lodash.mixin = mixin;
lodash.negate = negate;
lodash.nthArg = nthArg;
lodash.omit = omit;
lodash.omitBy = omitBy;
lodash.once = once;
lodash.orderBy = orderBy;
lodash.over = over;
lodash.overArgs = overArgs;
lodash.overEvery = overEvery;
lodash.overSome = overSome;
lodash.partial = partial;
lodash.partialRight = partialRight;
lodash.partition = partition;
lodash.pick = pick;
lodash.pickBy = pickBy;
lodash.property = property;
lodash.propertyOf = propertyOf;
lodash.pull = pull;
lodash.pullAll = pullAll;
lodash.pullAllBy = pullAllBy;
lodash.pullAllWith = pullAllWith;
lodash.pullAt = pullAt;
lodash.range = range;
lodash.rangeRight = rangeRight;
lodash.rearg = rearg;
lodash.reject = reject;
lodash.remove = remove;
lodash.rest = rest;
lodash.reverse = reverse;
lodash.sampleSize = sampleSize;
lodash.set = set;
lodash.setWith = setWith;
lodash.shuffle = shuffle;
lodash.slice = slice;
lodash.sortBy = sortBy;
lodash.sortedUniq = sortedUniq;
lodash.sortedUniqBy = sortedUniqBy;
lodash.split = split;
lodash.spread = spread;
lodash.tail = tail;
lodash.take = take;
lodash.takeRight = takeRight;
lodash.takeRightWhile = takeRightWhile;
lodash.takeWhile = takeWhile;
lodash.tap = tap;
lodash.throttle = throttle;
lodash.thru = thru;
lodash.toArray = toArray;
lodash.toPairs = toPairs;
lodash.toPairsIn = toPairsIn;
lodash.toPath = toPath;
lodash.toPlainObject = toPlainObject;
lodash.transform = transform;
lodash.unary = unary;
lodash.union = union;
lodash.unionBy = unionBy;
lodash.unionWith = unionWith;
lodash.uniq = uniq;
lodash.uniqBy = uniqBy;
lodash.uniqWith = uniqWith;
lodash.unset = unset;
lodash.unzip = unzip;
lodash.unzipWith = unzipWith;
lodash.update = update;
lodash.updateWith = updateWith;
lodash.values = values;
lodash.valuesIn = valuesIn;
lodash.without = without;
lodash.words = words;
lodash.wrap = wrap;
lodash.xor = xor;
lodash.xorBy = xorBy;
lodash.xorWith = xorWith;
lodash.zip = zip;
lodash.zipObject = zipObject;
lodash.zipObjectDeep = zipObjectDeep;
lodash.zipWith = zipWith;
// Add aliases.
lodash.entries = toPairs;
lodash.entriesIn = toPairsIn;
lodash.extend = assignIn;
lodash.extendWith = assignInWith;
// Add methods to `lodash.prototype`.
mixin(lodash, lodash);
/*------------------------------------------------------------------------*/
// Add methods that return unwrapped values in chain sequences.
lodash.add = add;
lodash.attempt = attempt;
lodash.camelCase = camelCase;
lodash.capitalize = capitalize;
lodash.ceil = ceil;
lodash.clamp = clamp;
lodash.clone = clone;
lodash.cloneDeep = cloneDeep;
lodash.cloneDeepWith = cloneDeepWith;
lodash.cloneWith = cloneWith;
lodash.conformsTo = conformsTo;
lodash.deburr = deburr;
lodash.defaultTo = defaultTo;
lodash.divide = divide;
lodash.endsWith = endsWith;
lodash.eq = eq;
lodash.escape = escape;
lodash.escapeRegExp = escapeRegExp;
lodash.every = every;
lodash.find = find;
lodash.findIndex = findIndex;
lodash.findKey = findKey;
lodash.findLast = findLast;
lodash.findLastIndex = findLastIndex;
lodash.findLastKey = findLastKey;
lodash.floor = floor;
lodash.forEach = forEach;
lodash.forEachRight = forEachRight;
lodash.forIn = forIn;
lodash.forInRight = forInRight;
lodash.forOwn = forOwn;
lodash.forOwnRight = forOwnRight;
lodash.get = get;
lodash.gt = gt;
lodash.gte = gte;
lodash.has = has;
lodash.hasIn = hasIn;
lodash.head = head;
lodash.identity = identity;
lodash.includes = includes;
lodash.indexOf = indexOf;
lodash.inRange = inRange;
lodash.invoke = invoke;
lodash.isArguments = isArguments;
lodash.isArray = isArray;
lodash.isArrayBuffer = isArrayBuffer;
lodash.isArrayLike = isArrayLike;
lodash.isArrayLikeObject = isArrayLikeObject;
lodash.isBoolean = isBoolean;
lodash.isBuffer = isBuffer;
lodash.isDate = isDate;
lodash.isElement = isElement;
lodash.isEmpty = isEmpty;
lodash.isEqual = isEqual;
lodash.isEqualWith = isEqualWith;
lodash.isError = isError;
lodash.isFinite = isFinite;
lodash.isFunction = isFunction;
lodash.isInteger = isInteger;
lodash.isLength = isLength;
lodash.isMap = isMap;
lodash.isMatch = isMatch;
lodash.isMatchWith = isMatchWith;
lodash.isNaN = isNaN;
lodash.isNative = isNative;
lodash.isNil = isNil;
lodash.isNull = isNull;
lodash.isNumber = isNumber;
lodash.isObject = isObject;
lodash.isObjectLike = isObjectLike;
lodash.isPlainObject = isPlainObject;
lodash.isRegExp = isRegExp;
lodash.isSafeInteger = isSafeInteger;
lodash.isSet = isSet;
lodash.isString = isString;
lodash.isSymbol = isSymbol;
lodash.isTypedArray = isTypedArray;
lodash.isUndefined = isUndefined;
lodash.isWeakMap = isWeakMap;
lodash.isWeakSet = isWeakSet;
lodash.join = join;
lodash.kebabCase = kebabCase;
lodash.last = last;
lodash.lastIndexOf = lastIndexOf;
lodash.lowerCase = lowerCase;
lodash.lowerFirst = lowerFirst;
lodash.lt = lt;
lodash.lte = lte;
lodash.max = max;
lodash.maxBy = maxBy;
lodash.mean = mean;
lodash.meanBy = meanBy;
lodash.min = min;
lodash.minBy = minBy;
lodash.stubArray = stubArray;
lodash.stubFalse = stubFalse;
lodash.stubObject = stubObject;
lodash.stubString = stubString;
lodash.stubTrue = stubTrue;
lodash.multiply = multiply;
lodash.nth = nth;
lodash.noConflict = noConflict;
lodash.noop = noop;
lodash.now = now;
lodash.pad = pad;
lodash.padEnd = padEnd;
lodash.padStart = padStart;
lodash.parseInt = parseInt;
lodash.random = random;
lodash.reduce = reduce;
lodash.reduceRight = reduceRight;
lodash.repeat = repeat;
lodash.replace = replace;
lodash.result = result;
lodash.round = round;
lodash.runInContext = runInContext;
lodash.sample = sample;
lodash.size = size;
lodash.snakeCase = snakeCase;
lodash.some = some;
lodash.sortedIndex = sortedIndex;
lodash.sortedIndexBy = sortedIndexBy;
lodash.sortedIndexOf = sortedIndexOf;
lodash.sortedLastIndex = sortedLastIndex;
lodash.sortedLastIndexBy = sortedLastIndexBy;
lodash.sortedLastIndexOf = sortedLastIndexOf;
lodash.startCase = startCase;
lodash.startsWith = startsWith;
lodash.subtract = subtract;
lodash.sum = sum;
lodash.sumBy = sumBy;
lodash.template = template;
lodash.times = times;
lodash.toFinite = toFinite;
lodash.toInteger = toInteger;
lodash.toLength = toLength;
lodash.toLower = toLower;
lodash.toNumber = toNumber;
lodash.toSafeInteger = toSafeInteger;
lodash.toString = toString;
lodash.toUpper = toUpper;
lodash.trim = trim;
lodash.trimEnd = trimEnd;
lodash.trimStart = trimStart;
lodash.truncate = truncate;
lodash.unescape = unescape;
lodash.uniqueId = uniqueId;
lodash.upperCase = upperCase;
lodash.upperFirst = upperFirst;
// Add aliases.
lodash.each = forEach;
lodash.eachRight = forEachRight;
lodash.first = head;
mixin(lodash, (function() {
var source = {};
baseForOwn(lodash, function(func, methodName) {
if (!hasOwnProperty.call(lodash.prototype, methodName)) {
source[methodName] = func;
}
});
return source;
}()), { 'chain': false });
/*------------------------------------------------------------------------*/
/**
* The semantic version number.
*
* @static
* @memberOf _
* @type {string}
*/
lodash.VERSION = VERSION;
// Assign default placeholders.
arrayEach(['bind', 'bindKey', 'curry', 'curryRight', 'partial', 'partialRight'], function(methodName) {
lodash[methodName].placeholder = lodash;
});
// Add `LazyWrapper` methods for `_.drop` and `_.take` variants.
arrayEach(['drop', 'take'], function(methodName, index) {
LazyWrapper.prototype[methodName] = function(n) {
var filtered = this.__filtered__;
if (filtered && !index) {
return new LazyWrapper(this);
}
n = n === undefined ? 1 : nativeMax(toInteger(n), 0);
var result = this.clone();
if (filtered) {
result.__takeCount__ = nativeMin(n, result.__takeCount__);
} else {
result.__views__.push({
'size': nativeMin(n, MAX_ARRAY_LENGTH),
'type': methodName + (result.__dir__ < 0 ? 'Right' : '')
});
}
return result;
};
LazyWrapper.prototype[methodName + 'Right'] = function(n) {
return this.reverse()[methodName](n).reverse();
};
});
// Add `LazyWrapper` methods that accept an `iteratee` value.
arrayEach(['filter', 'map', 'takeWhile'], function(methodName, index) {
var type = index + 1,
isFilter = type == LAZY_FILTER_FLAG || type == LAZY_WHILE_FLAG;
LazyWrapper.prototype[methodName] = function(iteratee) {
var result = this.clone();
result.__iteratees__.push({
'iteratee': getIteratee(iteratee, 3),
'type': type
});
result.__filtered__ = result.__filtered__ || isFilter;
return result;
};
});
// Add `LazyWrapper` methods for `_.head` and `_.last`.
arrayEach(['head', 'last'], function(methodName, index) {
var takeName = 'take' + (index ? 'Right' : '');
LazyWrapper.prototype[methodName] = function() {
return this[takeName](1).value()[0];
};
});
// Add `LazyWrapper` methods for `_.initial` and `_.tail`.
arrayEach(['initial', 'tail'], function(methodName, index) {
var dropName = 'drop' + (index ? '' : 'Right');
LazyWrapper.prototype[methodName] = function() {
return this.__filtered__ ? new LazyWrapper(this) : this[dropName](1);
};
});
LazyWrapper.prototype.compact = function() {
return this.filter(identity);
};
LazyWrapper.prototype.find = function(predicate) {
return this.filter(predicate).head();
};
LazyWrapper.prototype.findLast = function(predicate) {
return this.reverse().find(predicate);
};
LazyWrapper.prototype.invokeMap = baseRest(function(path, args) {
if (typeof path == 'function') {
return new LazyWrapper(this);
}
return this.map(function(value) {
return baseInvoke(value, path, args);
});
});
LazyWrapper.prototype.reject = function(predicate) {
return this.filter(negate(getIteratee(predicate)));
};
LazyWrapper.prototype.slice = function(start, end) {
start = toInteger(start);
var result = this;
if (result.__filtered__ && (start > 0 || end < 0)) {
return new LazyWrapper(result);
}
if (start < 0) {
result = result.takeRight(-start);
} else if (start) {
result = result.drop(start);
}
if (end !== undefined) {
end = toInteger(end);
result = end < 0 ? result.dropRight(-end) : result.take(end - start);
}
return result;
};
LazyWrapper.prototype.takeRightWhile = function(predicate) {
return this.reverse().takeWhile(predicate).reverse();
};
LazyWrapper.prototype.toArray = function() {
return this.take(MAX_ARRAY_LENGTH);
};
// Add `LazyWrapper` methods to `lodash.prototype`.
baseForOwn(LazyWrapper.prototype, function(func, methodName) {
var checkIteratee = /^(?:filter|find|map|reject)|While$/.test(methodName),
isTaker = /^(?:head|last)$/.test(methodName),
lodashFunc = lodash[isTaker ? ('take' + (methodName == 'last' ? 'Right' : '')) : methodName],
retUnwrapped = isTaker || /^find/.test(methodName);
if (!lodashFunc) {
return;
}
lodash.prototype[methodName] = function() {
var value = this.__wrapped__,
args = isTaker ? [1] : arguments,
isLazy = value instanceof LazyWrapper,
iteratee = args[0],
useLazy = isLazy || isArray(value);
var interceptor = function(value) {
var result = lodashFunc.apply(lodash, arrayPush([value], args));
return (isTaker && chainAll) ? result[0] : result;
};
if (useLazy && checkIteratee && typeof iteratee == 'function' && iteratee.length != 1) {
// Avoid lazy use if the iteratee has a "length" value other than `1`.
isLazy = useLazy = false;
}
var chainAll = this.__chain__,
isHybrid = !!this.__actions__.length,
isUnwrapped = retUnwrapped && !chainAll,
onlyLazy = isLazy && !isHybrid;
if (!retUnwrapped && useLazy) {
value = onlyLazy ? value : new LazyWrapper(this);
var result = func.apply(value, args);
result.__actions__.push({ 'func': thru, 'args': [interceptor], 'thisArg': undefined });
return new LodashWrapper(result, chainAll);
}
if (isUnwrapped && onlyLazy) {
return func.apply(this, args);
}
result = this.thru(interceptor);
return isUnwrapped ? (isTaker ? result.value()[0] : result.value()) : result;
};
});
// Add `Array` methods to `lodash.prototype`.
arrayEach(['pop', 'push', 'shift', 'sort', 'splice', 'unshift'], function(methodName) {
var func = arrayProto[methodName],
chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',
retUnwrapped = /^(?:pop|shift)$/.test(methodName);
lodash.prototype[methodName] = function() {
var args = arguments;
if (retUnwrapped && !this.__chain__) {
var value = this.value();
return func.apply(isArray(value) ? value : [], args);
}
return this[chainName](function(value) {
return func.apply(isArray(value) ? value : [], args);
});
};
});
// Map minified method names to their real names.
baseForOwn(LazyWrapper.prototype, function(func, methodName) {
var lodashFunc = lodash[methodName];
if (lodashFunc) {
var key = (lodashFunc.name + ''),
names = realNames[key] || (realNames[key] = []);
names.push({ 'name': methodName, 'func': lodashFunc });
}
});
realNames[createHybrid(undefined, BIND_KEY_FLAG).name] = [{
'name': 'wrapper',
'func': undefined
}];
// Add methods to `LazyWrapper`.
LazyWrapper.prototype.clone = lazyClone;
LazyWrapper.prototype.reverse = lazyReverse;
LazyWrapper.prototype.value = lazyValue;
// Add chain sequence methods to the `lodash` wrapper.
lodash.prototype.at = wrapperAt;
lodash.prototype.chain = wrapperChain;
lodash.prototype.commit = wrapperCommit;
lodash.prototype.next = wrapperNext;
lodash.prototype.plant = wrapperPlant;
lodash.prototype.reverse = wrapperReverse;
lodash.prototype.toJSON = lodash.prototype.valueOf = lodash.prototype.value = wrapperValue;
// Add lazy aliases.
lodash.prototype.first = lodash.prototype.head;
if (symIterator) {
lodash.prototype[symIterator] = wrapperToIterator;
}
return lodash;
});
/*--------------------------------------------------------------------------*/
// Export lodash.
var _ = runInContext();
// Some AMD build optimizers, like r.js, check for condition patterns like:
if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
// Expose Lodash on the global object to prevent errors when Lodash is
// loaded by a script tag in the presence of an AMD loader.
// See http://requirejs.org/docs/errors.html#mismatch for more details.
// Use `_.noConflict` to remove Lodash from the global object.
root._ = _;
// Define as an anonymous module so, through path mapping, it can be
// referenced as the "underscore" module.
define(function() {
return _;
});
}
// Check for `exports` after `define` in case a build optimizer adds it.
else if (freeModule) {
// Export for Node.js.
(freeModule.exports = _)._ = _;
// Export for CommonJS support.
freeExports._ = _;
}
else {
// Export to the global object.
root._ = _;
}
}.call(this));(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
typeof define === 'function' && define.amd ? define(['exports'], factory) :
(factory((global.d3 = global.d3 || {})));
}(this, (function (exports) { 'use strict';
var version = "4.9.1";
var ascending = function(a, b) {
return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
};
var bisector = function(compare) {
if (compare.length === 1) compare = ascendingComparator(compare);
return {
left: function(a, x, lo, hi) {
if (lo == null) lo = 0;
if (hi == null) hi = a.length;
while (lo < hi) {
var mid = lo + hi >>> 1;
if (compare(a[mid], x) < 0) lo = mid + 1;
else hi = mid;
}
return lo;
},
right: function(a, x, lo, hi) {
if (lo == null) lo = 0;
if (hi == null) hi = a.length;
while (lo < hi) {
var mid = lo + hi >>> 1;
if (compare(a[mid], x) > 0) hi = mid;
else lo = mid + 1;
}
return lo;
}
};
};
function ascendingComparator(f) {
return function(d, x) {
return ascending(f(d), x);
};
}
var ascendingBisect = bisector(ascending);
var bisectRight = ascendingBisect.right;
var bisectLeft = ascendingBisect.left;
var pairs = function(array, f) {
if (f == null) f = pair;
var i = 0, n = array.length - 1, p = array[0], pairs = new Array(n < 0 ? 0 : n);
while (i < n) pairs[i] = f(p, p = array[++i]);
return pairs;
};
function pair(a, b) {
return [a, b];
}
var cross = function(values0, values1, reduce) {
var n0 = values0.length,
n1 = values1.length,
values = new Array(n0 * n1),
i0,
i1,
i,
value0;
if (reduce == null) reduce = pair;
for (i0 = i = 0; i0 < n0; ++i0) {
for (value0 = values0[i0], i1 = 0; i1 < n1; ++i1, ++i) {
values[i] = reduce(value0, values1[i1]);
}
}
return values;
};
var descending = function(a, b) {
return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
};
var number = function(x) {
return x === null ? NaN : +x;
};
var variance = function(values, valueof) {
var n = values.length,
m = 0,
i = -1,
mean = 0,
value,
delta,
sum = 0;
if (valueof == null) {
while (++i < n) {
if (!isNaN(value = number(values[i]))) {
delta = value - mean;
mean += delta / ++m;
sum += delta * (value - mean);
}
}
}
else {
while (++i < n) {
if (!isNaN(value = number(valueof(values[i], i, values)))) {
delta = value - mean;
mean += delta / ++m;
sum += delta * (value - mean);
}
}
}
if (m > 1) return sum / (m - 1);
};
var deviation = function(array, f) {
var v = variance(array, f);
return v ? Math.sqrt(v) : v;
};
var extent = function(values, valueof) {
var n = values.length,
i = -1,
value,
min,
max;
if (valueof == null) {
while (++i < n) { // Find the first comparable value.
if ((value = values[i]) != null && value >= value) {
min = max = value;
while (++i < n) { // Compare the remaining values.
if ((value = values[i]) != null) {
if (min > value) min = value;
if (max < value) max = value;
}
}
}
}
}
else {
while (++i < n) { // Find the first comparable value.
if ((value = valueof(values[i], i, values)) != null && value >= value) {
min = max = value;
while (++i < n) { // Compare the remaining values.
if ((value = valueof(values[i], i, values)) != null) {
if (min > value) min = value;
if (max < value) max = value;
}
}
}
}
}
return [min, max];
};
var array = Array.prototype;
var slice = array.slice;
var map = array.map;
var constant = function(x) {
return function() {
return x;
};
};
var identity = function(x) {
return x;
};
var sequence = function(start, stop, step) {
start = +start, stop = +stop, step = (n = arguments.length) < 2 ? (stop = start, start = 0, 1) : n < 3 ? 1 : +step;
var i = -1,
n = Math.max(0, Math.ceil((stop - start) / step)) | 0,
range = new Array(n);
while (++i < n) {
range[i] = start + i * step;
}
return range;
};
var e10 = Math.sqrt(50);
var e5 = Math.sqrt(10);
var e2 = Math.sqrt(2);
var ticks = function(start, stop, count) {
var reverse = stop < start,
i = -1,
n,
ticks,
step;
if (reverse) n = start, start = stop, stop = n;
if ((step = tickIncrement(start, stop, count)) === 0 || !isFinite(step)) return [];
if (step > 0) {
start = Math.ceil(start / step);
stop = Math.floor(stop / step);
ticks = new Array(n = Math.ceil(stop - start + 1));
while (++i < n) ticks[i] = (start + i) * step;
} else {
start = Math.floor(start * step);
stop = Math.ceil(stop * step);
ticks = new Array(n = Math.ceil(start - stop + 1));
while (++i < n) ticks[i] = (start - i) / step;
}
if (reverse) ticks.reverse();
return ticks;
};
function tickIncrement(start, stop, count) {
var step = (stop - start) / Math.max(0, count),
power = Math.floor(Math.log(step) / Math.LN10),
error = step / Math.pow(10, power);
return power >= 0
? (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1) * Math.pow(10, power)
: -Math.pow(10, -power) / (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1);
}
function tickStep(start, stop, count) {
var step0 = Math.abs(stop - start) / Math.max(0, count),
step1 = Math.pow(10, Math.floor(Math.log(step0) / Math.LN10)),
error = step0 / step1;
if (error >= e10) step1 *= 10;
else if (error >= e5) step1 *= 5;
else if (error >= e2) step1 *= 2;
return stop < start ? -step1 : step1;
}
var sturges = function(values) {
return Math.ceil(Math.log(values.length) / Math.LN2) + 1;
};
var histogram = function() {
var value = identity,
domain = extent,
threshold = sturges;
function histogram(data) {
var i,
n = data.length,
x,
values = new Array(n);
for (i = 0; i < n; ++i) {
values[i] = value(data[i], i, data);
}
var xz = domain(values),
x0 = xz[0],
x1 = xz[1],
tz = threshold(values, x0, x1);
// Convert number of thresholds into uniform thresholds.
if (!Array.isArray(tz)) {
tz = tickStep(x0, x1, tz);
tz = sequence(Math.ceil(x0 / tz) * tz, Math.floor(x1 / tz) * tz, tz); // exclusive
}
// Remove any thresholds outside the domain.
var m = tz.length;
while (tz[0] <= x0) tz.shift(), --m;
while (tz[m - 1] > x1) tz.pop(), --m;
var bins = new Array(m + 1),
bin;
// Initialize bins.
for (i = 0; i <= m; ++i) {
bin = bins[i] = [];
bin.x0 = i > 0 ? tz[i - 1] : x0;
bin.x1 = i < m ? tz[i] : x1;
}
// Assign data to bins by value, ignoring any outside the domain.
for (i = 0; i < n; ++i) {
x = values[i];
if (x0 <= x && x <= x1) {
bins[bisectRight(tz, x, 0, m)].push(data[i]);
}
}
return bins;
}
histogram.value = function(_) {
return arguments.length ? (value = typeof _ === "function" ? _ : constant(_), histogram) : value;
};
histogram.domain = function(_) {
return arguments.length ? (domain = typeof _ === "function" ? _ : constant([_[0], _[1]]), histogram) : domain;
};
histogram.thresholds = function(_) {
return arguments.length ? (threshold = typeof _ === "function" ? _ : Array.isArray(_) ? constant(slice.call(_)) : constant(_), histogram) : threshold;
};
return histogram;
};
var threshold = function(values, p, valueof) {
if (valueof == null) valueof = number;
if (!(n = values.length)) return;
if ((p = +p) <= 0 || n < 2) return +valueof(values[0], 0, values);
if (p >= 1) return +valueof(values[n - 1], n - 1, values);
var n,
i = (n - 1) * p,
i0 = Math.floor(i),
value0 = +valueof(values[i0], i0, values),
value1 = +valueof(values[i0 + 1], i0 + 1, values);
return value0 + (value1 - value0) * (i - i0);
};
var freedmanDiaconis = function(values, min, max) {
values = map.call(values, number).sort(ascending);
return Math.ceil((max - min) / (2 * (threshold(values, 0.75) - threshold(values, 0.25)) * Math.pow(values.length, -1 / 3)));
};
var scott = function(values, min, max) {
return Math.ceil((max - min) / (3.5 * deviation(values) * Math.pow(values.length, -1 / 3)));
};
var max = function(values, valueof) {
var n = values.length,
i = -1,
value,
max;
if (valueof == null) {
while (++i < n) { // Find the first comparable value.
if ((value = values[i]) != null && value >= value) {
max = value;
while (++i < n) { // Compare the remaining values.
if ((value = values[i]) != null && value > max) {
max = value;
}
}
}
}
}
else {
while (++i < n) { // Find the first comparable value.
if ((value = valueof(values[i], i, values)) != null && value >= value) {
max = value;
while (++i < n) { // Compare the remaining values.
if ((value = valueof(values[i], i, values)) != null && value > max) {
max = value;
}
}
}
}
}
return max;
};
var mean = function(values, valueof) {
var n = values.length,
m = n,
i = -1,
value,
sum = 0;
if (valueof == null) {
while (++i < n) {
if (!isNaN(value = number(values[i]))) sum += value;
else --m;
}
}
else {
while (++i < n) {
if (!isNaN(value = number(valueof(values[i], i, values)))) sum += value;
else --m;
}
}
if (m) return sum / m;
};
var median = function(values, valueof) {
var n = values.length,
i = -1,
value,
numbers = [];
if (valueof == null) {
while (++i < n) {
if (!isNaN(value = number(values[i]))) {
numbers.push(value);
}
}
}
else {
while (++i < n) {
if (!isNaN(value = number(valueof(values[i], i, values)))) {
numbers.push(value);
}
}
}
return threshold(numbers.sort(ascending), 0.5);
};
var merge = function(arrays) {
var n = arrays.length,
m,
i = -1,
j = 0,
merged,
array;
while (++i < n) j += arrays[i].length;
merged = new Array(j);
while (--n >= 0) {
array = arrays[n];
m = array.length;
while (--m >= 0) {
merged[--j] = array[m];
}
}
return merged;
};
var min = function(values, valueof) {
var n = values.length,
i = -1,
value,
min;
if (valueof == null) {
while (++i < n) { // Find the first comparable value.
if ((value = values[i]) != null && value >= value) {
min = value;
while (++i < n) { // Compare the remaining values.
if ((value = values[i]) != null && min > value) {
min = value;
}
}
}
}
}
else {
while (++i < n) { // Find the first comparable value.
if ((value = valueof(values[i], i, values)) != null && value >= value) {
min = value;
while (++i < n) { // Compare the remaining values.
if ((value = valueof(values[i], i, values)) != null && min > value) {
min = value;
}
}
}
}
}
return min;
};
var permute = function(array, indexes) {
var i = indexes.length, permutes = new Array(i);
while (i--) permutes[i] = array[indexes[i]];
return permutes;
};
var scan = function(values, compare) {
if (!(n = values.length)) return;
var n,
i = 0,
j = 0,
xi,
xj = values[j];
if (compare == null) compare = ascending;
while (++i < n) {
if (compare(xi = values[i], xj) < 0 || compare(xj, xj) !== 0) {
xj = xi, j = i;
}
}
if (compare(xj, xj) === 0) return j;
};
var shuffle = function(array, i0, i1) {
var m = (i1 == null ? array.length : i1) - (i0 = i0 == null ? 0 : +i0),
t,
i;
while (m) {
i = Math.random() * m-- | 0;
t = array[m + i0];
array[m + i0] = array[i + i0];
array[i + i0] = t;
}
return array;
};
var sum = function(values, valueof) {
var n = values.length,
i = -1,
value,
sum = 0;
if (valueof == null) {
while (++i < n) {
if (value = +values[i]) sum += value; // Note: zero and null are equivalent.
}
}
else {
while (++i < n) {
if (value = +valueof(values[i], i, values)) sum += value;
}
}
return sum;
};
var transpose = function(matrix) {
if (!(n = matrix.length)) return [];
for (var i = -1, m = min(matrix, length), transpose = new Array(m); ++i < m;) {
for (var j = -1, n, row = transpose[i] = new Array(n); ++j < n;) {
row[j] = matrix[j][i];
}
}
return transpose;
};
function length(d) {
return d.length;
}
var zip = function() {
return transpose(arguments);
};
var slice$1 = Array.prototype.slice;
var identity$1 = function(x) {
return x;
};
var top = 1;
var right = 2;
var bottom = 3;
var left = 4;
var epsilon = 1e-6;
function translateX(x) {
return "translate(" + (x + 0.5) + ",0)";
}
function translateY(y) {
return "translate(0," + (y + 0.5) + ")";
}
function center(scale) {
var offset = Math.max(0, scale.bandwidth() - 1) / 2; // Adjust for 0.5px offset.
if (scale.round()) offset = Math.round(offset);
return function(d) {
return scale(d) + offset;
};
}
function entering() {
return !this.__axis;
}
function axis(orient, scale) {
var tickArguments = [],
tickValues = null,
tickFormat = null,
tickSizeInner = 6,
tickSizeOuter = 6,
tickPadding = 3,
k = orient === top || orient === left ? -1 : 1,
x = orient === left || orient === right ? "x" : "y",
transform = orient === top || orient === bottom ? translateX : translateY;
function axis(context) {
var values = tickValues == null ? (scale.ticks ? scale.ticks.apply(scale, tickArguments) : scale.domain()) : tickValues,
format = tickFormat == null ? (scale.tickFormat ? scale.tickFormat.apply(scale, tickArguments) : identity$1) : tickFormat,
spacing = Math.max(tickSizeInner, 0) + tickPadding,
range = scale.range(),
range0 = range[0] + 0.5,
range1 = range[range.length - 1] + 0.5,
position = (scale.bandwidth ? center : identity$1)(scale.copy()),
selection = context.selection ? context.selection() : context,
path = selection.selectAll(".domain").data([null]),
tick = selection.selectAll(".tick").data(values, scale).order(),
tickExit = tick.exit(),
tickEnter = tick.enter().append("g").attr("class", "tick"),
line = tick.select("line"),
text = tick.select("text");
path = path.merge(path.enter().insert("path", ".tick")
.attr("class", "domain")
.attr("stroke", "#000"));
tick = tick.merge(tickEnter);
line = line.merge(tickEnter.append("line")
.attr("stroke", "#000")
.attr(x + "2", k * tickSizeInner));
text = text.merge(tickEnter.append("text")
.attr("fill", "#000")
.attr(x, k * spacing)
.attr("dy", orient === top ? "0em" : orient === bottom ? "0.71em" : "0.32em"));
if (context !== selection) {
path = path.transition(context);
tick = tick.transition(context);
line = line.transition(context);
text = text.transition(context);
tickExit = tickExit.transition(context)
.attr("opacity", epsilon)
.attr("transform", function(d) { return isFinite(d = position(d)) ? transform(d) : this.getAttribute("transform"); });
tickEnter
.attr("opacity", epsilon)
.attr("transform", function(d) { var p = this.parentNode.__axis; return transform(p && isFinite(p = p(d)) ? p : position(d)); });
}
tickExit.remove();
path
.attr("d", orient === left || orient == right
? "M" + k * tickSizeOuter + "," + range0 + "H0.5V" + range1 + "H" + k * tickSizeOuter
: "M" + range0 + "," + k * tickSizeOuter + "V0.5H" + range1 + "V" + k * tickSizeOuter);
tick
.attr("opacity", 1)
.attr("transform", function(d) { return transform(position(d)); });
line
.attr(x + "2", k * tickSizeInner);
text
.attr(x, k * spacing)
.text(format);
selection.filter(entering)
.attr("fill", "none")
.attr("font-size", 10)
.attr("font-family", "sans-serif")
.attr("text-anchor", orient === right ? "start" : orient === left ? "end" : "middle");
selection
.each(function() { this.__axis = position; });
}
axis.scale = function(_) {
return arguments.length ? (scale = _, axis) : scale;
};
axis.ticks = function() {
return tickArguments = slice$1.call(arguments), axis;
};
axis.tickArguments = function(_) {
return arguments.length ? (tickArguments = _ == null ? [] : slice$1.call(_), axis) : tickArguments.slice();
};
axis.tickValues = function(_) {
return arguments.length ? (tickValues = _ == null ? null : slice$1.call(_), axis) : tickValues && tickValues.slice();
};
axis.tickFormat = function(_) {
return arguments.length ? (tickFormat = _, axis) : tickFormat;
};
axis.tickSize = function(_) {
return arguments.length ? (tickSizeInner = tickSizeOuter = +_, axis) : tickSizeInner;
};
axis.tickSizeInner = function(_) {
return arguments.length ? (tickSizeInner = +_, axis) : tickSizeInner;
};
axis.tickSizeOuter = function(_) {
return arguments.length ? (tickSizeOuter = +_, axis) : tickSizeOuter;
};
axis.tickPadding = function(_) {
return arguments.length ? (tickPadding = +_, axis) : tickPadding;
};
return axis;
}
function axisTop(scale) {
return axis(top, scale);
}
function axisRight(scale) {
return axis(right, scale);
}
function axisBottom(scale) {
return axis(bottom, scale);
}
function axisLeft(scale) {
return axis(left, scale);
}
var noop = {value: function() {}};
function dispatch() {
for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
if (!(t = arguments[i] + "") || (t in _)) throw new Error("illegal type: " + t);
_[t] = [];
}
return new Dispatch(_);
}
function Dispatch(_) {
this._ = _;
}
function parseTypenames(typenames, types) {
return typenames.trim().split(/^|\s+/).map(function(t) {
var name = "", i = t.indexOf(".");
if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
if (t && !types.hasOwnProperty(t)) throw new Error("unknown type: " + t);
return {type: t, name: name};
});
}
Dispatch.prototype = dispatch.prototype = {
constructor: Dispatch,
on: function(typename, callback) {
var _ = this._,
T = parseTypenames(typename + "", _),
t,
i = -1,
n = T.length;
// If no callback was specified, return the callback of the given type and name.
if (arguments.length < 2) {
while (++i < n) if ((t = (typename = T[i]).type) && (t = get(_[t], typename.name))) return t;
return;
}
// If a type was specified, set the callback for the given type and name.
// Otherwise, if a null callback was specified, remove callbacks of the given name.
if (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback);
while (++i < n) {
if (t = (typename = T[i]).type) _[t] = set(_[t], typename.name, callback);
else if (callback == null) for (t in _) _[t] = set(_[t], typename.name, null);
}
return this;
},
copy: function() {
var copy = {}, _ = this._;
for (var t in _) copy[t] = _[t].slice();
return new Dispatch(copy);
},
call: function(type, that) {
if ((n = arguments.length - 2) > 0) for (var args = new Array(n), i = 0, n, t; i < n; ++i) args[i] = arguments[i + 2];
if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
for (t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
},
apply: function(type, that, args) {
if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
for (var t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
}
};
function get(type, name) {
for (var i = 0, n = type.length, c; i < n; ++i) {
if ((c = type[i]).name === name) {
return c.value;
}
}
}
function set(type, name, callback) {
for (var i = 0, n = type.length; i < n; ++i) {
if (type[i].name === name) {
type[i] = noop, type = type.slice(0, i).concat(type.slice(i + 1));
break;
}
}
if (callback != null) type.push({name: name, value: callback});
return type;
}
var xhtml = "http://www.w3.org/1999/xhtml";
var namespaces = {
svg: "http://www.w3.org/2000/svg",
xhtml: xhtml,
xlink: "http://www.w3.org/1999/xlink",
xml: "http://www.w3.org/XML/1998/namespace",
xmlns: "http://www.w3.org/2000/xmlns/"
};
var namespace = function(name) {
var prefix = name += "", i = prefix.indexOf(":");
if (i >= 0 && (prefix = name.slice(0, i)) !== "xmlns") name = name.slice(i + 1);
return namespaces.hasOwnProperty(prefix) ? {space: namespaces[prefix], local: name} : name;
};
function creatorInherit(name) {
return function() {
var document = this.ownerDocument,
uri = this.namespaceURI;
return uri === xhtml && document.documentElement.namespaceURI === xhtml
? document.createElement(name)
: document.createElementNS(uri, name);
};
}
function creatorFixed(fullname) {
return function() {
return this.ownerDocument.createElementNS(fullname.space, fullname.local);
};
}
var creator = function(name) {
var fullname = namespace(name);
return (fullname.local
? creatorFixed
: creatorInherit)(fullname);
};
var nextId = 0;
function local$1() {
return new Local;
}
function Local() {
this._ = "@" + (++nextId).toString(36);
}
Local.prototype = local$1.prototype = {
constructor: Local,
get: function(node) {
var id = this._;
while (!(id in node)) if (!(node = node.parentNode)) return;
return node[id];
},
set: function(node, value) {
return node[this._] = value;
},
remove: function(node) {
return this._ in node && delete node[this._];
},
toString: function() {
return this._;
}
};
var matcher = function(selector) {
return function() {
return this.matches(selector);
};
};
if (typeof document !== "undefined") {
var element = document.documentElement;
if (!element.matches) {
var vendorMatches = element.webkitMatchesSelector
|| element.msMatchesSelector
|| element.mozMatchesSelector
|| element.oMatchesSelector;
matcher = function(selector) {
return function() {
return vendorMatches.call(this, selector);
};
};
}
}
var matcher$1 = matcher;
var filterEvents = {};
exports.event = null;
if (typeof document !== "undefined") {
var element$1 = document.documentElement;
if (!("onmouseenter" in element$1)) {
filterEvents = {mouseenter: "mouseover", mouseleave: "mouseout"};
}
}
function filterContextListener(listener, index, group) {
listener = contextListener(listener, index, group);
return function(event) {
var related = event.relatedTarget;
if (!related || (related !== this && !(related.compareDocumentPosition(this) & 8))) {
listener.call(this, event);
}
};
}
function contextListener(listener, index, group) {
return function(event1) {
var event0 = exports.event; // Events can be reentrant (e.g., focus).
exports.event = event1;
try {
listener.call(this, this.__data__, index, group);
} finally {
exports.event = event0;
}
};
}
function parseTypenames$1(typenames) {
return typenames.trim().split(/^|\s+/).map(function(t) {
var name = "", i = t.indexOf(".");
if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
return {type: t, name: name};
});
}
function onRemove(typename) {
return function() {
var on = this.__on;
if (!on) return;
for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {
if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {
this.removeEventListener(o.type, o.listener, o.capture);
} else {
on[++i] = o;
}
}
if (++i) on.length = i;
else delete this.__on;
};
}
function onAdd(typename, value, capture) {
var wrap = filterEvents.hasOwnProperty(typename.type) ? filterContextListener : contextListener;
return function(d, i, group) {
var on = this.__on, o, listener = wrap(value, i, group);
if (on) for (var j = 0, m = on.length; j < m; ++j) {
if ((o = on[j]).type === typename.type && o.name === typename.name) {
this.removeEventListener(o.type, o.listener, o.capture);
this.addEventListener(o.type, o.listener = listener, o.capture = capture);
o.value = value;
return;
}
}
this.addEventListener(typename.type, listener, capture);
o = {type: typename.type, name: typename.name, value: value, listener: listener, capture: capture};
if (!on) this.__on = [o];
else on.push(o);
};
}
var selection_on = function(typename, value, capture) {
var typenames = parseTypenames$1(typename + ""), i, n = typenames.length, t;
if (arguments.length < 2) {
var on = this.node().__on;
if (on) for (var j = 0, m = on.length, o; j < m; ++j) {
for (i = 0, o = on[j]; i < n; ++i) {
if ((t = typenames[i]).type === o.type && t.name === o.name) {
return o.value;
}
}
}
return;
}
on = value ? onAdd : onRemove;
if (capture == null) capture = false;
for (i = 0; i < n; ++i) this.each(on(typenames[i], value, capture));
return this;
};
function customEvent(event1, listener, that, args) {
var event0 = exports.event;
event1.sourceEvent = exports.event;
exports.event = event1;
try {
return listener.apply(that, args);
} finally {
exports.event = event0;
}
}
var sourceEvent = function() {
var current = exports.event, source;
while (source = current.sourceEvent) current = source;
return current;
};
var point = function(node, event) {
var svg = node.ownerSVGElement || node;
if (svg.createSVGPoint) {
var point = svg.createSVGPoint();
point.x = event.clientX, point.y = event.clientY;
point = point.matrixTransform(node.getScreenCTM().inverse());
return [point.x, point.y];
}
var rect = node.getBoundingClientRect();
return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];
};
var mouse = function(node) {
var event = sourceEvent();
if (event.changedTouches) event = event.changedTouches[0];
return point(node, event);
};
function none() {}
var selector = function(selector) {
return selector == null ? none : function() {
return this.querySelector(selector);
};
};
var selection_select = function(select) {
if (typeof select !== "function") select = selector(select);
for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
if ("__data__" in node) subnode.__data__ = node.__data__;
subgroup[i] = subnode;
}
}
}
return new Selection(subgroups, this._parents);
};
function empty$1() {
return [];
}
var selectorAll = function(selector) {
return selector == null ? empty$1 : function() {
return this.querySelectorAll(selector);
};
};
var selection_selectAll = function(select) {
if (typeof select !== "function") select = selectorAll(select);
for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
if (node = group[i]) {
subgroups.push(select.call(node, node.__data__, i, group));
parents.push(node);
}
}
}
return new Selection(subgroups, parents);
};
var selection_filter = function(match) {
if (typeof match !== "function") match = matcher$1(match);
for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
subgroup.push(node);
}
}
}
return new Selection(subgroups, this._parents);
};
var sparse = function(update) {
return new Array(update.length);
};
var selection_enter = function() {
return new Selection(this._enter || this._groups.map(sparse), this._parents);
};
function EnterNode(parent, datum) {
this.ownerDocument = parent.ownerDocument;
this.namespaceURI = parent.namespaceURI;
this._next = null;
this._parent = parent;
this.__data__ = datum;
}
EnterNode.prototype = {
constructor: EnterNode,
appendChild: function(child) { return this._parent.insertBefore(child, this._next); },
insertBefore: function(child, next) { return this._parent.insertBefore(child, next); },
querySelector: function(selector) { return this._parent.querySelector(selector); },
querySelectorAll: function(selector) { return this._parent.querySelectorAll(selector); }
};
var constant$1 = function(x) {
return function() {
return x;
};
};
var keyPrefix = "$"; // Protect against keys like “__proto__”.
function bindIndex(parent, group, enter, update, exit, data) {
var i = 0,
node,
groupLength = group.length,
dataLength = data.length;
// Put any non-null nodes that fit into update.
// Put any null nodes into enter.
// Put any remaining data into enter.
for (; i < dataLength; ++i) {
if (node = group[i]) {
node.__data__ = data[i];
update[i] = node;
} else {
enter[i] = new EnterNode(parent, data[i]);
}
}
// Put any non-null nodes that don’t fit into exit.
for (; i < groupLength; ++i) {
if (node = group[i]) {
exit[i] = node;
}
}
}
function bindKey(parent, group, enter, update, exit, data, key) {
var i,
node,
nodeByKeyValue = {},
groupLength = group.length,
dataLength = data.length,
keyValues = new Array(groupLength),
keyValue;
// Compute the key for each node.
// If multiple nodes have the same key, the duplicates are added to exit.
for (i = 0; i < groupLength; ++i) {
if (node = group[i]) {
keyValues[i] = keyValue = keyPrefix + key.call(node, node.__data__, i, group);
if (keyValue in nodeByKeyValue) {
exit[i] = node;
} else {
nodeByKeyValue[keyValue] = node;
}
}
}
// Compute the key for each datum.
// If there a node associated with this key, join and add it to update.
// If there is not (or the key is a duplicate), add it to enter.
for (i = 0; i < dataLength; ++i) {
keyValue = keyPrefix + key.call(parent, data[i], i, data);
if (node = nodeByKeyValue[keyValue]) {
update[i] = node;
node.__data__ = data[i];
nodeByKeyValue[keyValue] = null;
} else {
enter[i] = new EnterNode(parent, data[i]);
}
}
// Add any remaining nodes that were not bound to data to exit.
for (i = 0; i < groupLength; ++i) {
if ((node = group[i]) && (nodeByKeyValue[keyValues[i]] === node)) {
exit[i] = node;
}
}
}
var selection_data = function(value, key) {
if (!value) {
data = new Array(this.size()), j = -1;
this.each(function(d) { data[++j] = d; });
return data;
}
var bind = key ? bindKey : bindIndex,
parents = this._parents,
groups = this._groups;
if (typeof value !== "function") value = constant$1(value);
for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {
var parent = parents[j],
group = groups[j],
groupLength = group.length,
data = value.call(parent, parent && parent.__data__, j, parents),
dataLength = data.length,
enterGroup = enter[j] = new Array(dataLength),
updateGroup = update[j] = new Array(dataLength),
exitGroup = exit[j] = new Array(groupLength);
bind(parent, group, enterGroup, updateGroup, exitGroup, data, key);
// Now connect the enter nodes to their following update node, such that
// appendChild can insert the materialized enter node before this node,
// rather than at the end of the parent node.
for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {
if (previous = enterGroup[i0]) {
if (i0 >= i1) i1 = i0 + 1;
while (!(next = updateGroup[i1]) && ++i1 < dataLength);
previous._next = next || null;
}
}
}
update = new Selection(update, parents);
update._enter = enter;
update._exit = exit;
return update;
};
var selection_exit = function() {
return new Selection(this._exit || this._groups.map(sparse), this._parents);
};
var selection_merge = function(selection) {
for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
if (node = group0[i] || group1[i]) {
merge[i] = node;
}
}
}
for (; j < m0; ++j) {
merges[j] = groups0[j];
}
return new Selection(merges, this._parents);
};
var selection_order = function() {
for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {
for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {
if (node = group[i]) {
if (next && next !== node.nextSibling) next.parentNode.insertBefore(node, next);
next = node;
}
}
}
return this;
};
var selection_sort = function(compare) {
if (!compare) compare = ascending$1;
function compareNode(a, b) {
return a && b ? compare(a.__data__, b.__data__) : !a - !b;
}
for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) {
for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) {
if (node = group[i]) {
sortgroup[i] = node;
}
}
sortgroup.sort(compareNode);
}
return new Selection(sortgroups, this._parents).order();
};
function ascending$1(a, b) {
return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
}
var selection_call = function() {
var callback = arguments[0];
arguments[0] = this;
callback.apply(null, arguments);
return this;
};
var selection_nodes = function() {
var nodes = new Array(this.size()), i = -1;
this.each(function() { nodes[++i] = this; });
return nodes;
};
var selection_node = function() {
for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {
var node = group[i];
if (node) return node;
}
}
return null;
};
var selection_size = function() {
var size = 0;
this.each(function() { ++size; });
return size;
};
var selection_empty = function() {
return !this.node();
};
var selection_each = function(callback) {
for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {
if (node = group[i]) callback.call(node, node.__data__, i, group);
}
}
return this;
};
function attrRemove(name) {
return function() {
this.removeAttribute(name);
};
}
function attrRemoveNS(fullname) {
return function() {
this.removeAttributeNS(fullname.space, fullname.local);
};
}
function attrConstant(name, value) {
return function() {
this.setAttribute(name, value);
};
}
function attrConstantNS(fullname, value) {
return function() {
this.setAttributeNS(fullname.space, fullname.local, value);
};
}
function attrFunction(name, value) {
return function() {
var v = value.apply(this, arguments);
if (v == null) this.removeAttribute(name);
else this.setAttribute(name, v);
};
}
function attrFunctionNS(fullname, value) {
return function() {
var v = value.apply(this, arguments);
if (v == null) this.removeAttributeNS(fullname.space, fullname.local);
else this.setAttributeNS(fullname.space, fullname.local, v);
};
}
var selection_attr = function(name, value) {
var fullname = namespace(name);
if (arguments.length < 2) {
var node = this.node();
return fullname.local
? node.getAttributeNS(fullname.space, fullname.local)
: node.getAttribute(fullname);
}
return this.each((value == null
? (fullname.local ? attrRemoveNS : attrRemove) : (typeof value === "function"
? (fullname.local ? attrFunctionNS : attrFunction)
: (fullname.local ? attrConstantNS : attrConstant)))(fullname, value));
};
var defaultView = function(node) {
return (node.ownerDocument && node.ownerDocument.defaultView) // node is a Node
|| (node.document && node) // node is a Window
|| node.defaultView; // node is a Document
};
function styleRemove(name) {
return function() {
this.style.removeProperty(name);
};
}
function styleConstant(name, value, priority) {
return function() {
this.style.setProperty(name, value, priority);
};
}
function styleFunction(name, value, priority) {
return function() {
var v = value.apply(this, arguments);
if (v == null) this.style.removeProperty(name);
else this.style.setProperty(name, v, priority);
};
}
var selection_style = function(name, value, priority) {
return arguments.length > 1
? this.each((value == null
? styleRemove : typeof value === "function"
? styleFunction
: styleConstant)(name, value, priority == null ? "" : priority))
: styleValue(this.node(), name);
};
function styleValue(node, name) {
return node.style.getPropertyValue(name)
|| defaultView(node).getComputedStyle(node, null).getPropertyValue(name);
}
function propertyRemove(name) {
return function() {
delete this[name];
};
}
function propertyConstant(name, value) {
return function() {
this[name] = value;
};
}
function propertyFunction(name, value) {
return function() {
var v = value.apply(this, arguments);
if (v == null) delete this[name];
else this[name] = v;
};
}
var selection_property = function(name, value) {
return arguments.length > 1
? this.each((value == null
? propertyRemove : typeof value === "function"
? propertyFunction
: propertyConstant)(name, value))
: this.node()[name];
};
function classArray(string) {
return string.trim().split(/^|\s+/);
}
function classList(node) {
return node.classList || new ClassList(node);
}
function ClassList(node) {
this._node = node;
this._names = classArray(node.getAttribute("class") || "");
}
ClassList.prototype = {
add: function(name) {
var i = this._names.indexOf(name);
if (i < 0) {
this._names.push(name);
this._node.setAttribute("class", this._names.join(" "));
}
},
remove: function(name) {
var i = this._names.indexOf(name);
if (i >= 0) {
this._names.splice(i, 1);
this._node.setAttribute("class", this._names.join(" "));
}
},
contains: function(name) {
return this._names.indexOf(name) >= 0;
}
};
function classedAdd(node, names) {
var list = classList(node), i = -1, n = names.length;
while (++i < n) list.add(names[i]);
}
function classedRemove(node, names) {
var list = classList(node), i = -1, n = names.length;
while (++i < n) list.remove(names[i]);
}
function classedTrue(names) {
return function() {
classedAdd(this, names);
};
}
function classedFalse(names) {
return function() {
classedRemove(this, names);
};
}
function classedFunction(names, value) {
return function() {
(value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);
};
}
var selection_classed = function(name, value) {
var names = classArray(name + "");
if (arguments.length < 2) {
var list = classList(this.node()), i = -1, n = names.length;
while (++i < n) if (!list.contains(names[i])) return false;
return true;
}
return this.each((typeof value === "function"
? classedFunction : value
? classedTrue
: classedFalse)(names, value));
};
function textRemove() {
this.textContent = "";
}
function textConstant(value) {
return function() {
this.textContent = value;
};
}
function textFunction(value) {
return function() {
var v = value.apply(this, arguments);
this.textContent = v == null ? "" : v;
};
}
var selection_text = function(value) {
return arguments.length
? this.each(value == null
? textRemove : (typeof value === "function"
? textFunction
: textConstant)(value))
: this.node().textContent;
};
function htmlRemove() {
this.innerHTML = "";
}
function htmlConstant(value) {
return function() {
this.innerHTML = value;
};
}
function htmlFunction(value) {
return function() {
var v = value.apply(this, arguments);
this.innerHTML = v == null ? "" : v;
};
}
var selection_html = function(value) {
return arguments.length
? this.each(value == null
? htmlRemove : (typeof value === "function"
? htmlFunction
: htmlConstant)(value))
: this.node().innerHTML;
};
function raise() {
if (this.nextSibling) this.parentNode.appendChild(this);
}
var selection_raise = function() {
return this.each(raise);
};
function lower() {
if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild);
}
var selection_lower = function() {
return this.each(lower);
};
var selection_append = function(name) {
var create = typeof name === "function" ? name : creator(name);
return this.select(function() {
return this.appendChild(create.apply(this, arguments));
});
};
function constantNull() {
return null;
}
var selection_insert = function(name, before) {
var create = typeof name === "function" ? name : creator(name),
select = before == null ? constantNull : typeof before === "function" ? before : selector(before);
return this.select(function() {
return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);
});
};
function remove() {
var parent = this.parentNode;
if (parent) parent.removeChild(this);
}
var selection_remove = function() {
return this.each(remove);
};
var selection_datum = function(value) {
return arguments.length
? this.property("__data__", value)
: this.node().__data__;
};
function dispatchEvent(node, type, params) {
var window = defaultView(node),
event = window.CustomEvent;
if (typeof event === "function") {
event = new event(type, params);
} else {
event = window.document.createEvent("Event");
if (params) event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail;
else event.initEvent(type, false, false);
}
node.dispatchEvent(event);
}
function dispatchConstant(type, params) {
return function() {
return dispatchEvent(this, type, params);
};
}
function dispatchFunction(type, params) {
return function() {
return dispatchEvent(this, type, params.apply(this, arguments));
};
}
var selection_dispatch = function(type, params) {
return this.each((typeof params === "function"
? dispatchFunction
: dispatchConstant)(type, params));
};
var root = [null];
function Selection(groups, parents) {
this._groups = groups;
this._parents = parents;
}
function selection() {
return new Selection([[document.documentElement]], root);
}
Selection.prototype = selection.prototype = {
constructor: Selection,
select: selection_select,
selectAll: selection_selectAll,
filter: selection_filter,
data: selection_data,
enter: selection_enter,
exit: selection_exit,
merge: selection_merge,
order: selection_order,
sort: selection_sort,
call: selection_call,
nodes: selection_nodes,
node: selection_node,
size: selection_size,
empty: selection_empty,
each: selection_each,
attr: selection_attr,
style: selection_style,
property: selection_property,
classed: selection_classed,
text: selection_text,
html: selection_html,
raise: selection_raise,
lower: selection_lower,
append: selection_append,
insert: selection_insert,
remove: selection_remove,
datum: selection_datum,
on: selection_on,
dispatch: selection_dispatch
};
var select = function(selector) {
return typeof selector === "string"
? new Selection([[document.querySelector(selector)]], [document.documentElement])
: new Selection([[selector]], root);
};
var selectAll = function(selector) {
return typeof selector === "string"
? new Selection([document.querySelectorAll(selector)], [document.documentElement])
: new Selection([selector == null ? [] : selector], root);
};
var touch = function(node, touches, identifier) {
if (arguments.length < 3) identifier = touches, touches = sourceEvent().changedTouches;
for (var i = 0, n = touches ? touches.length : 0, touch; i < n; ++i) {
if ((touch = touches[i]).identifier === identifier) {
return point(node, touch);
}
}
return null;
};
var touches = function(node, touches) {
if (touches == null) touches = sourceEvent().touches;
for (var i = 0, n = touches ? touches.length : 0, points = new Array(n); i < n; ++i) {
points[i] = point(node, touches[i]);
}
return points;
};
function nopropagation() {
exports.event.stopImmediatePropagation();
}
var noevent = function() {
exports.event.preventDefault();
exports.event.stopImmediatePropagation();
};
var dragDisable = function(view) {
var root = view.document.documentElement,
selection$$1 = select(view).on("dragstart.drag", noevent, true);
if ("onselectstart" in root) {
selection$$1.on("selectstart.drag", noevent, true);
} else {
root.__noselect = root.style.MozUserSelect;
root.style.MozUserSelect = "none";
}
};
function yesdrag(view, noclick) {
var root = view.document.documentElement,
selection$$1 = select(view).on("dragstart.drag", null);
if (noclick) {
selection$$1.on("click.drag", noevent, true);
setTimeout(function() { selection$$1.on("click.drag", null); }, 0);
}
if ("onselectstart" in root) {
selection$$1.on("selectstart.drag", null);
} else {
root.style.MozUserSelect = root.__noselect;
delete root.__noselect;
}
}
var constant$2 = function(x) {
return function() {
return x;
};
};
function DragEvent(target, type, subject, id, active, x, y, dx, dy, dispatch) {
this.target = target;
this.type = type;
this.subject = subject;
this.identifier = id;
this.active = active;
this.x = x;
this.y = y;
this.dx = dx;
this.dy = dy;
this._ = dispatch;
}
DragEvent.prototype.on = function() {
var value = this._.on.apply(this._, arguments);
return value === this._ ? this : value;
};
// Ignore right-click, since that should open the context menu.
function defaultFilter$1() {
return !exports.event.button;
}
function defaultContainer() {
return this.parentNode;
}
function defaultSubject(d) {
return d == null ? {x: exports.event.x, y: exports.event.y} : d;
}
var drag = function() {
var filter = defaultFilter$1,
container = defaultContainer,
subject = defaultSubject,
gestures = {},
listeners = dispatch("start", "drag", "end"),
active = 0,
mousedownx,
mousedowny,
mousemoving,
touchending,
clickDistance2 = 0;
function drag(selection$$1) {
selection$$1
.on("mousedown.drag", mousedowned)
.on("touchstart.drag", touchstarted)
.on("touchmove.drag", touchmoved)
.on("touchend.drag touchcancel.drag", touchended)
.style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
}
function mousedowned() {
if (touchending || !filter.apply(this, arguments)) return;
var gesture = beforestart("mouse", container.apply(this, arguments), mouse, this, arguments);
if (!gesture) return;
select(exports.event.view).on("mousemove.drag", mousemoved, true).on("mouseup.drag", mouseupped, true);
dragDisable(exports.event.view);
nopropagation();
mousemoving = false;
mousedownx = exports.event.clientX;
mousedowny = exports.event.clientY;
gesture("start");
}
function mousemoved() {
noevent();
if (!mousemoving) {
var dx = exports.event.clientX - mousedownx, dy = exports.event.clientY - mousedowny;
mousemoving = dx * dx + dy * dy > clickDistance2;
}
gestures.mouse("drag");
}
function mouseupped() {
select(exports.event.view).on("mousemove.drag mouseup.drag", null);
yesdrag(exports.event.view, mousemoving);
noevent();
gestures.mouse("end");
}
function touchstarted() {
if (!filter.apply(this, arguments)) return;
var touches$$1 = exports.event.changedTouches,
c = container.apply(this, arguments),
n = touches$$1.length, i, gesture;
for (i = 0; i < n; ++i) {
if (gesture = beforestart(touches$$1[i].identifier, c, touch, this, arguments)) {
nopropagation();
gesture("start");
}
}
}
function touchmoved() {
var touches$$1 = exports.event.changedTouches,
n = touches$$1.length, i, gesture;
for (i = 0; i < n; ++i) {
if (gesture = gestures[touches$$1[i].identifier]) {
noevent();
gesture("drag");
}
}
}
function touchended() {
var touches$$1 = exports.event.changedTouches,
n = touches$$1.length, i, gesture;
if (touchending) clearTimeout(touchending);
touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!
for (i = 0; i < n; ++i) {
if (gesture = gestures[touches$$1[i].identifier]) {
nopropagation();
gesture("end");
}
}
}
function beforestart(id, container, point, that, args) {
var p = point(container, id), s, dx, dy,
sublisteners = listeners.copy();
if (!customEvent(new DragEvent(drag, "beforestart", s, id, active, p[0], p[1], 0, 0, sublisteners), function() {
if ((exports.event.subject = s = subject.apply(that, args)) == null) return false;
dx = s.x - p[0] || 0;
dy = s.y - p[1] || 0;
return true;
})) return;
return function gesture(type) {
var p0 = p, n;
switch (type) {
case "start": gestures[id] = gesture, n = active++; break;
case "end": delete gestures[id], --active; // nobreak
case "drag": p = point(container, id), n = active; break;
}
customEvent(new DragEvent(drag, type, s, id, n, p[0] + dx, p[1] + dy, p[0] - p0[0], p[1] - p0[1], sublisteners), sublisteners.apply, sublisteners, [type, that, args]);
};
}
drag.filter = function(_) {
return arguments.length ? (filter = typeof _ === "function" ? _ : constant$2(!!_), drag) : filter;
};
drag.container = function(_) {
return arguments.length ? (container = typeof _ === "function" ? _ : constant$2(_), drag) : container;
};
drag.subject = function(_) {
return arguments.length ? (subject = typeof _ === "function" ? _ : constant$2(_), drag) : subject;
};
drag.on = function() {
var value = listeners.on.apply(listeners, arguments);
return value === listeners ? drag : value;
};
drag.clickDistance = function(_) {
return arguments.length ? (clickDistance2 = (_ = +_) * _, drag) : Math.sqrt(clickDistance2);
};
return drag;
};
var define = function(constructor, factory, prototype) {
constructor.prototype = factory.prototype = prototype;
prototype.constructor = constructor;
};
function extend(parent, definition) {
var prototype = Object.create(parent.prototype);
for (var key in definition) prototype[key] = definition[key];
return prototype;
}
function Color() {}
var darker = 0.7;
var brighter = 1 / darker;
var reI = "\\s*([+-]?\\d+)\\s*";
var reN = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)\\s*";
var reP = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)%\\s*";
var reHex3 = /^#([0-9a-f]{3})$/;
var reHex6 = /^#([0-9a-f]{6})$/;
var reRgbInteger = new RegExp("^rgb\\(" + [reI, reI, reI] + "\\)$");
var reRgbPercent = new RegExp("^rgb\\(" + [reP, reP, reP] + "\\)$");
var reRgbaInteger = new RegExp("^rgba\\(" + [reI, reI, reI, reN] + "\\)$");
var reRgbaPercent = new RegExp("^rgba\\(" + [reP, reP, reP, reN] + "\\)$");
var reHslPercent = new RegExp("^hsl\\(" + [reN, reP, reP] + "\\)$");
var reHslaPercent = new RegExp("^hsla\\(" + [reN, reP, reP, reN] + "\\)$");
var named = {
aliceblue: 0xf0f8ff,
antiquewhite: 0xfaebd7,
aqua: 0x00ffff,
aquamarine: 0x7fffd4,
azure: 0xf0ffff,
beige: 0xf5f5dc,
bisque: 0xffe4c4,
black: 0x000000,
blanchedalmond: 0xffebcd,
blue: 0x0000ff,
blueviolet: 0x8a2be2,
brown: 0xa52a2a,
burlywood: 0xdeb887,
cadetblue: 0x5f9ea0,
chartreuse: 0x7fff00,
chocolate: 0xd2691e,
coral: 0xff7f50,
cornflowerblue: 0x6495ed,
cornsilk: 0xfff8dc,
crimson: 0xdc143c,
cyan: 0x00ffff,
darkblue: 0x00008b,
darkcyan: 0x008b8b,
darkgoldenrod: 0xb8860b,
darkgray: 0xa9a9a9,
darkgreen: 0x006400,
darkgrey: 0xa9a9a9,
darkkhaki: 0xbdb76b,
darkmagenta: 0x8b008b,
darkolivegreen: 0x556b2f,
darkorange: 0xff8c00,
darkorchid: 0x9932cc,
darkred: 0x8b0000,
darksalmon: 0xe9967a,
darkseagreen: 0x8fbc8f,
darkslateblue: 0x483d8b,
darkslategray: 0x2f4f4f,
darkslategrey: 0x2f4f4f,
darkturquoise: 0x00ced1,
darkviolet: 0x9400d3,
deeppink: 0xff1493,
deepskyblue: 0x00bfff,
dimgray: 0x696969,
dimgrey: 0x696969,
dodgerblue: 0x1e90ff,
firebrick: 0xb22222,
floralwhite: 0xfffaf0,
forestgreen: 0x228b22,
fuchsia: 0xff00ff,
gainsboro: 0xdcdcdc,
ghostwhite: 0xf8f8ff,
gold: 0xffd700,
goldenrod: 0xdaa520,
gray: 0x808080,
green: 0x008000,
greenyellow: 0xadff2f,
grey: 0x808080,
honeydew: 0xf0fff0,
hotpink: 0xff69b4,
indianred: 0xcd5c5c,
indigo: 0x4b0082,
ivory: 0xfffff0,
khaki: 0xf0e68c,
lavender: 0xe6e6fa,
lavenderblush: 0xfff0f5,
lawngreen: 0x7cfc00,
lemonchiffon: 0xfffacd,
lightblue: 0xadd8e6,
lightcoral: 0xf08080,
lightcyan: 0xe0ffff,
lightgoldenrodyellow: 0xfafad2,
lightgray: 0xd3d3d3,
lightgreen: 0x90ee90,
lightgrey: 0xd3d3d3,
lightpink: 0xffb6c1,
lightsalmon: 0xffa07a,
lightseagreen: 0x20b2aa,
lightskyblue: 0x87cefa,
lightslategray: 0x778899,
lightslategrey: 0x778899,
lightsteelblue: 0xb0c4de,
lightyellow: 0xffffe0,
lime: 0x00ff00,
limegreen: 0x32cd32,
linen: 0xfaf0e6,
magenta: 0xff00ff,
maroon: 0x800000,
mediumaquamarine: 0x66cdaa,
mediumblue: 0x0000cd,
mediumorchid: 0xba55d3,
mediumpurple: 0x9370db,
mediumseagreen: 0x3cb371,
mediumslateblue: 0x7b68ee,
mediumspringgreen: 0x00fa9a,
mediumturquoise: 0x48d1cc,
mediumvioletred: 0xc71585,
midnightblue: 0x191970,
mintcream: 0xf5fffa,
mistyrose: 0xffe4e1,
moccasin: 0xffe4b5,
navajowhite: 0xffdead,
navy: 0x000080,
oldlace: 0xfdf5e6,
olive: 0x808000,
olivedrab: 0x6b8e23,
orange: 0xffa500,
orangered: 0xff4500,
orchid: 0xda70d6,
palegoldenrod: 0xeee8aa,
palegreen: 0x98fb98,
paleturquoise: 0xafeeee,
palevioletred: 0xdb7093,
papayawhip: 0xffefd5,
peachpuff: 0xffdab9,
peru: 0xcd853f,
pink: 0xffc0cb,
plum: 0xdda0dd,
powderblue: 0xb0e0e6,
purple: 0x800080,
rebeccapurple: 0x663399,
red: 0xff0000,
rosybrown: 0xbc8f8f,
royalblue: 0x4169e1,
saddlebrown: 0x8b4513,
salmon: 0xfa8072,
sandybrown: 0xf4a460,
seagreen: 0x2e8b57,
seashell: 0xfff5ee,
sienna: 0xa0522d,
silver: 0xc0c0c0,
skyblue: 0x87ceeb,
slateblue: 0x6a5acd,
slategray: 0x708090,
slategrey: 0x708090,
snow: 0xfffafa,
springgreen: 0x00ff7f,
steelblue: 0x4682b4,
tan: 0xd2b48c,
teal: 0x008080,
thistle: 0xd8bfd8,
tomato: 0xff6347,
turquoise: 0x40e0d0,
violet: 0xee82ee,
wheat: 0xf5deb3,
white: 0xffffff,
whitesmoke: 0xf5f5f5,
yellow: 0xffff00,
yellowgreen: 0x9acd32
};
define(Color, color, {
displayable: function() {
return this.rgb().displayable();
},
toString: function() {
return this.rgb() + "";
}
});
function color(format) {
var m;
format = (format + "").trim().toLowerCase();
return (m = reHex3.exec(format)) ? (m = parseInt(m[1], 16), new Rgb((m >> 8 & 0xf) | (m >> 4 & 0x0f0), (m >> 4 & 0xf) | (m & 0xf0), ((m & 0xf) << 4) | (m & 0xf), 1)) // #f00
: (m = reHex6.exec(format)) ? rgbn(parseInt(m[1], 16)) // #ff0000
: (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)
: (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)
: (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)
: (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)
: (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)
: (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)
: named.hasOwnProperty(format) ? rgbn(named[format])
: format === "transparent" ? new Rgb(NaN, NaN, NaN, 0)
: null;
}
function rgbn(n) {
return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);
}
function rgba(r, g, b, a) {
if (a <= 0) r = g = b = NaN;
return new Rgb(r, g, b, a);
}
function rgbConvert(o) {
if (!(o instanceof Color)) o = color(o);
if (!o) return new Rgb;
o = o.rgb();
return new Rgb(o.r, o.g, o.b, o.opacity);
}
function rgb(r, g, b, opacity) {
return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity);
}
function Rgb(r, g, b, opacity) {
this.r = +r;
this.g = +g;
this.b = +b;
this.opacity = +opacity;
}
define(Rgb, rgb, extend(Color, {
brighter: function(k) {
k = k == null ? brighter : Math.pow(brighter, k);
return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
},
darker: function(k) {
k = k == null ? darker : Math.pow(darker, k);
return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
},
rgb: function() {
return this;
},
displayable: function() {
return (0 <= this.r && this.r <= 255)
&& (0 <= this.g && this.g <= 255)
&& (0 <= this.b && this.b <= 255)
&& (0 <= this.opacity && this.opacity <= 1);
},
toString: function() {
var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
return (a === 1 ? "rgb(" : "rgba(")
+ Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", "
+ Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", "
+ Math.max(0, Math.min(255, Math.round(this.b) || 0))
+ (a === 1 ? ")" : ", " + a + ")");
}
}));
function hsla(h, s, l, a) {
if (a <= 0) h = s = l = NaN;
else if (l <= 0 || l >= 1) h = s = NaN;
else if (s <= 0) h = NaN;
return new Hsl(h, s, l, a);
}
function hslConvert(o) {
if (o instanceof Hsl) return new Hsl(o.h, o.s, o.l, o.opacity);
if (!(o instanceof Color)) o = color(o);
if (!o) return new Hsl;
if (o instanceof Hsl) return o;
o = o.rgb();
var r = o.r / 255,
g = o.g / 255,
b = o.b / 255,
min = Math.min(r, g, b),
max = Math.max(r, g, b),
h = NaN,
s = max - min,
l = (max + min) / 2;
if (s) {
if (r === max) h = (g - b) / s + (g < b) * 6;
else if (g === max) h = (b - r) / s + 2;
else h = (r - g) / s + 4;
s /= l < 0.5 ? max + min : 2 - max - min;
h *= 60;
} else {
s = l > 0 && l < 1 ? 0 : h;
}
return new Hsl(h, s, l, o.opacity);
}
function hsl(h, s, l, opacity) {
return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity);
}
function Hsl(h, s, l, opacity) {
this.h = +h;
this.s = +s;
this.l = +l;
this.opacity = +opacity;
}
define(Hsl, hsl, extend(Color, {
brighter: function(k) {
k = k == null ? brighter : Math.pow(brighter, k);
return new Hsl(this.h, this.s, this.l * k, this.opacity);
},
darker: function(k) {
k = k == null ? darker : Math.pow(darker, k);
return new Hsl(this.h, this.s, this.l * k, this.opacity);
},
rgb: function() {
var h = this.h % 360 + (this.h < 0) * 360,
s = isNaN(h) || isNaN(this.s) ? 0 : this.s,
l = this.l,
m2 = l + (l < 0.5 ? l : 1 - l) * s,
m1 = 2 * l - m2;
return new Rgb(
hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2),
hsl2rgb(h, m1, m2),
hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2),
this.opacity
);
},
displayable: function() {
return (0 <= this.s && this.s <= 1 || isNaN(this.s))
&& (0 <= this.l && this.l <= 1)
&& (0 <= this.opacity && this.opacity <= 1);
}
}));
/* From FvD 13.37, CSS Color Module Level 3 */
function hsl2rgb(h, m1, m2) {
return (h < 60 ? m1 + (m2 - m1) * h / 60
: h < 180 ? m2
: h < 240 ? m1 + (m2 - m1) * (240 - h) / 60
: m1) * 255;
}
var deg2rad = Math.PI / 180;
var rad2deg = 180 / Math.PI;
var Kn = 18;
var Xn = 0.950470;
var Yn = 1;
var Zn = 1.088830;
var t0 = 4 / 29;
var t1 = 6 / 29;
var t2 = 3 * t1 * t1;
var t3 = t1 * t1 * t1;
function labConvert(o) {
if (o instanceof Lab) return new Lab(o.l, o.a, o.b, o.opacity);
if (o instanceof Hcl) {
var h = o.h * deg2rad;
return new Lab(o.l, Math.cos(h) * o.c, Math.sin(h) * o.c, o.opacity);
}
if (!(o instanceof Rgb)) o = rgbConvert(o);
var b = rgb2xyz(o.r),
a = rgb2xyz(o.g),
l = rgb2xyz(o.b),
x = xyz2lab((0.4124564 * b + 0.3575761 * a + 0.1804375 * l) / Xn),
y = xyz2lab((0.2126729 * b + 0.7151522 * a + 0.0721750 * l) / Yn),
z = xyz2lab((0.0193339 * b + 0.1191920 * a + 0.9503041 * l) / Zn);
return new Lab(116 * y - 16, 500 * (x - y), 200 * (y - z), o.opacity);
}
function lab(l, a, b, opacity) {
return arguments.length === 1 ? labConvert(l) : new Lab(l, a, b, opacity == null ? 1 : opacity);
}
function Lab(l, a, b, opacity) {
this.l = +l;
this.a = +a;
this.b = +b;
this.opacity = +opacity;
}
define(Lab, lab, extend(Color, {
brighter: function(k) {
return new Lab(this.l + Kn * (k == null ? 1 : k), this.a, this.b, this.opacity);
},
darker: function(k) {
return new Lab(this.l - Kn * (k == null ? 1 : k), this.a, this.b, this.opacity);
},
rgb: function() {
var y = (this.l + 16) / 116,
x = isNaN(this.a) ? y : y + this.a / 500,
z = isNaN(this.b) ? y : y - this.b / 200;
y = Yn * lab2xyz(y);
x = Xn * lab2xyz(x);
z = Zn * lab2xyz(z);
return new Rgb(
xyz2rgb( 3.2404542 * x - 1.5371385 * y - 0.4985314 * z), // D65 -> sRGB
xyz2rgb(-0.9692660 * x + 1.8760108 * y + 0.0415560 * z),
xyz2rgb( 0.0556434 * x - 0.2040259 * y + 1.0572252 * z),
this.opacity
);
}
}));
function xyz2lab(t) {
return t > t3 ? Math.pow(t, 1 / 3) : t / t2 + t0;
}
function lab2xyz(t) {
return t > t1 ? t * t * t : t2 * (t - t0);
}
function xyz2rgb(x) {
return 255 * (x <= 0.0031308 ? 12.92 * x : 1.055 * Math.pow(x, 1 / 2.4) - 0.055);
}
function rgb2xyz(x) {
return (x /= 255) <= 0.04045 ? x / 12.92 : Math.pow((x + 0.055) / 1.055, 2.4);
}
function hclConvert(o) {
if (o instanceof Hcl) return new Hcl(o.h, o.c, o.l, o.opacity);
if (!(o instanceof Lab)) o = labConvert(o);
var h = Math.atan2(o.b, o.a) * rad2deg;
return new Hcl(h < 0 ? h + 360 : h, Math.sqrt(o.a * o.a + o.b * o.b), o.l, o.opacity);
}
function hcl(h, c, l, opacity) {
return arguments.length === 1 ? hclConvert(h) : new Hcl(h, c, l, opacity == null ? 1 : opacity);
}
function Hcl(h, c, l, opacity) {
this.h = +h;
this.c = +c;
this.l = +l;
this.opacity = +opacity;
}
define(Hcl, hcl, extend(Color, {
brighter: function(k) {
return new Hcl(this.h, this.c, this.l + Kn * (k == null ? 1 : k), this.opacity);
},
darker: function(k) {
return new Hcl(this.h, this.c, this.l - Kn * (k == null ? 1 : k), this.opacity);
},
rgb: function() {
return labConvert(this).rgb();
}
}));
var A = -0.14861;
var B = +1.78277;
var C = -0.29227;
var D = -0.90649;
var E = +1.97294;
var ED = E * D;
var EB = E * B;
var BC_DA = B * C - D * A;
function cubehelixConvert(o) {
if (o instanceof Cubehelix) return new Cubehelix(o.h, o.s, o.l, o.opacity);
if (!(o instanceof Rgb)) o = rgbConvert(o);
var r = o.r / 255,
g = o.g / 255,
b = o.b / 255,
l = (BC_DA * b + ED * r - EB * g) / (BC_DA + ED - EB),
bl = b - l,
k = (E * (g - l) - C * bl) / D,
s = Math.sqrt(k * k + bl * bl) / (E * l * (1 - l)), // NaN if l=0 or l=1
h = s ? Math.atan2(k, bl) * rad2deg - 120 : NaN;
return new Cubehelix(h < 0 ? h + 360 : h, s, l, o.opacity);
}
function cubehelix(h, s, l, opacity) {
return arguments.length === 1 ? cubehelixConvert(h) : new Cubehelix(h, s, l, opacity == null ? 1 : opacity);
}
function Cubehelix(h, s, l, opacity) {
this.h = +h;
this.s = +s;
this.l = +l;
this.opacity = +opacity;
}
define(Cubehelix, cubehelix, extend(Color, {
brighter: function(k) {
k = k == null ? brighter : Math.pow(brighter, k);
return new Cubehelix(this.h, this.s, this.l * k, this.opacity);
},
darker: function(k) {
k = k == null ? darker : Math.pow(darker, k);
return new Cubehelix(this.h, this.s, this.l * k, this.opacity);
},
rgb: function() {
var h = isNaN(this.h) ? 0 : (this.h + 120) * deg2rad,
l = +this.l,
a = isNaN(this.s) ? 0 : this.s * l * (1 - l),
cosh = Math.cos(h),
sinh = Math.sin(h);
return new Rgb(
255 * (l + a * (A * cosh + B * sinh)),
255 * (l + a * (C * cosh + D * sinh)),
255 * (l + a * (E * cosh)),
this.opacity
);
}
}));
function basis(t1, v0, v1, v2, v3) {
var t2 = t1 * t1, t3 = t2 * t1;
return ((1 - 3 * t1 + 3 * t2 - t3) * v0
+ (4 - 6 * t2 + 3 * t3) * v1
+ (1 + 3 * t1 + 3 * t2 - 3 * t3) * v2
+ t3 * v3) / 6;
}
var basis$1 = function(values) {
var n = values.length - 1;
return function(t) {
var i = t <= 0 ? (t = 0) : t >= 1 ? (t = 1, n - 1) : Math.floor(t * n),
v1 = values[i],
v2 = values[i + 1],
v0 = i > 0 ? values[i - 1] : 2 * v1 - v2,
v3 = i < n - 1 ? values[i + 2] : 2 * v2 - v1;
return basis((t - i / n) * n, v0, v1, v2, v3);
};
};
var basisClosed = function(values) {
var n = values.length;
return function(t) {
var i = Math.floor(((t %= 1) < 0 ? ++t : t) * n),
v0 = values[(i + n - 1) % n],
v1 = values[i % n],
v2 = values[(i + 1) % n],
v3 = values[(i + 2) % n];
return basis((t - i / n) * n, v0, v1, v2, v3);
};
};
var constant$3 = function(x) {
return function() {
return x;
};
};
function linear(a, d) {
return function(t) {
return a + t * d;
};
}
function exponential(a, b, y) {
return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function(t) {
return Math.pow(a + t * b, y);
};
}
function hue(a, b) {
var d = b - a;
return d ? linear(a, d > 180 || d < -180 ? d - 360 * Math.round(d / 360) : d) : constant$3(isNaN(a) ? b : a);
}
function gamma(y) {
return (y = +y) === 1 ? nogamma : function(a, b) {
return b - a ? exponential(a, b, y) : constant$3(isNaN(a) ? b : a);
};
}
function nogamma(a, b) {
var d = b - a;
return d ? linear(a, d) : constant$3(isNaN(a) ? b : a);
}
var interpolateRgb = ((function rgbGamma(y) {
var color$$1 = gamma(y);
function rgb$$1(start, end) {
var r = color$$1((start = rgb(start)).r, (end = rgb(end)).r),
g = color$$1(start.g, end.g),
b = color$$1(start.b, end.b),
opacity = nogamma(start.opacity, end.opacity);
return function(t) {
start.r = r(t);
start.g = g(t);
start.b = b(t);
start.opacity = opacity(t);
return start + "";
};
}
rgb$$1.gamma = rgbGamma;
return rgb$$1;
}))(1);
function rgbSpline(spline) {
return function(colors) {
var n = colors.length,
r = new Array(n),
g = new Array(n),
b = new Array(n),
i, color$$1;
for (i = 0; i < n; ++i) {
color$$1 = rgb(colors[i]);
r[i] = color$$1.r || 0;
g[i] = color$$1.g || 0;
b[i] = color$$1.b || 0;
}
r = spline(r);
g = spline(g);
b = spline(b);
color$$1.opacity = 1;
return function(t) {
color$$1.r = r(t);
color$$1.g = g(t);
color$$1.b = b(t);
return color$$1 + "";
};
};
}
var rgbBasis = rgbSpline(basis$1);
var rgbBasisClosed = rgbSpline(basisClosed);
var array$1 = function(a, b) {
var nb = b ? b.length : 0,
na = a ? Math.min(nb, a.length) : 0,
x = new Array(nb),
c = new Array(nb),
i;
for (i = 0; i < na; ++i) x[i] = interpolateValue(a[i], b[i]);
for (; i < nb; ++i) c[i] = b[i];
return function(t) {
for (i = 0; i < na; ++i) c[i] = x[i](t);
return c;
};
};
var date = function(a, b) {
var d = new Date;
return a = +a, b -= a, function(t) {
return d.setTime(a + b * t), d;
};
};
var reinterpolate = function(a, b) {
return a = +a, b -= a, function(t) {
return a + b * t;
};
};
var object = function(a, b) {
var i = {},
c = {},
k;
if (a === null || typeof a !== "object") a = {};
if (b === null || typeof b !== "object") b = {};
for (k in b) {
if (k in a) {
i[k] = interpolateValue(a[k], b[k]);
} else {
c[k] = b[k];
}
}
return function(t) {
for (k in i) c[k] = i[k](t);
return c;
};
};
var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g;
var reB = new RegExp(reA.source, "g");
function zero(b) {
return function() {
return b;
};
}
function one(b) {
return function(t) {
return b(t) + "";
};
}
var interpolateString = function(a, b) {
var bi = reA.lastIndex = reB.lastIndex = 0, // scan index for next number in b
am, // current match in a
bm, // current match in b
bs, // string preceding current number in b, if any
i = -1, // index in s
s = [], // string constants and placeholders
q = []; // number interpolators
// Coerce inputs to strings.
a = a + "", b = b + "";
// Interpolate pairs of numbers in a & b.
while ((am = reA.exec(a))
&& (bm = reB.exec(b))) {
if ((bs = bm.index) > bi) { // a string precedes the next number in b
bs = b.slice(bi, bs);
if (s[i]) s[i] += bs; // coalesce with previous string
else s[++i] = bs;
}
if ((am = am[0]) === (bm = bm[0])) { // numbers in a & b match
if (s[i]) s[i] += bm; // coalesce with previous string
else s[++i] = bm;
} else { // interpolate non-matching numbers
s[++i] = null;
q.push({i: i, x: reinterpolate(am, bm)});
}
bi = reB.lastIndex;
}
// Add remains of b.
if (bi < b.length) {
bs = b.slice(bi);
if (s[i]) s[i] += bs; // coalesce with previous string
else s[++i] = bs;
}
// Special optimization for only a single match.
// Otherwise, interpolate each of the numbers and rejoin the string.
return s.length < 2 ? (q[0]
? one(q[0].x)
: zero(b))
: (b = q.length, function(t) {
for (var i = 0, o; i < b; ++i) s[(o = q[i]).i] = o.x(t);
return s.join("");
});
};
var interpolateValue = function(a, b) {
var t = typeof b, c;
return b == null || t === "boolean" ? constant$3(b)
: (t === "number" ? reinterpolate
: t === "string" ? ((c = color(b)) ? (b = c, interpolateRgb) : interpolateString)
: b instanceof color ? interpolateRgb
: b instanceof Date ? date
: Array.isArray(b) ? array$1
: typeof b.valueOf !== "function" && typeof b.toString !== "function" || isNaN(b) ? object
: reinterpolate)(a, b);
};
var interpolateRound = function(a, b) {
return a = +a, b -= a, function(t) {
return Math.round(a + b * t);
};
};
var degrees = 180 / Math.PI;
var identity$2 = {
translateX: 0,
translateY: 0,
rotate: 0,
skewX: 0,
scaleX: 1,
scaleY: 1
};
var decompose = function(a, b, c, d, e, f) {
var scaleX, scaleY, skewX;
if (scaleX = Math.sqrt(a * a + b * b)) a /= scaleX, b /= scaleX;
if (skewX = a * c + b * d) c -= a * skewX, d -= b * skewX;
if (scaleY = Math.sqrt(c * c + d * d)) c /= scaleY, d /= scaleY, skewX /= scaleY;
if (a * d < b * c) a = -a, b = -b, skewX = -skewX, scaleX = -scaleX;
return {
translateX: e,
translateY: f,
rotate: Math.atan2(b, a) * degrees,
skewX: Math.atan(skewX) * degrees,
scaleX: scaleX,
scaleY: scaleY
};
};
var cssNode;
var cssRoot;
var cssView;
var svgNode;
function parseCss(value) {
if (value === "none") return identity$2;
if (!cssNode) cssNode = document.createElement("DIV"), cssRoot = document.documentElement, cssView = document.defaultView;
cssNode.style.transform = value;
value = cssView.getComputedStyle(cssRoot.appendChild(cssNode), null).getPropertyValue("transform");
cssRoot.removeChild(cssNode);
value = value.slice(7, -1).split(",");
return decompose(+value[0], +value[1], +value[2], +value[3], +value[4], +value[5]);
}
function parseSvg(value) {
if (value == null) return identity$2;
if (!svgNode) svgNode = document.createElementNS("http://www.w3.org/2000/svg", "g");
svgNode.setAttribute("transform", value);
if (!(value = svgNode.transform.baseVal.consolidate())) return identity$2;
value = value.matrix;
return decompose(value.a, value.b, value.c, value.d, value.e, value.f);
}
function interpolateTransform(parse, pxComma, pxParen, degParen) {
function pop(s) {
return s.length ? s.pop() + " " : "";
}
function translate(xa, ya, xb, yb, s, q) {
if (xa !== xb || ya !== yb) {
var i = s.push("translate(", null, pxComma, null, pxParen);
q.push({i: i - 4, x: reinterpolate(xa, xb)}, {i: i - 2, x: reinterpolate(ya, yb)});
} else if (xb || yb) {
s.push("translate(" + xb + pxComma + yb + pxParen);
}
}
function rotate(a, b, s, q) {
if (a !== b) {
if (a - b > 180) b += 360; else if (b - a > 180) a += 360; // shortest path
q.push({i: s.push(pop(s) + "rotate(", null, degParen) - 2, x: reinterpolate(a, b)});
} else if (b) {
s.push(pop(s) + "rotate(" + b + degParen);
}
}
function skewX(a, b, s, q) {
if (a !== b) {
q.push({i: s.push(pop(s) + "skewX(", null, degParen) - 2, x: reinterpolate(a, b)});
} else if (b) {
s.push(pop(s) + "skewX(" + b + degParen);
}
}
function scale(xa, ya, xb, yb, s, q) {
if (xa !== xb || ya !== yb) {
var i = s.push(pop(s) + "scale(", null, ",", null, ")");
q.push({i: i - 4, x: reinterpolate(xa, xb)}, {i: i - 2, x: reinterpolate(ya, yb)});
} else if (xb !== 1 || yb !== 1) {
s.push(pop(s) + "scale(" + xb + "," + yb + ")");
}
}
return function(a, b) {
var s = [], // string constants and placeholders
q = []; // number interpolators
a = parse(a), b = parse(b);
translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);
rotate(a.rotate, b.rotate, s, q);
skewX(a.skewX, b.skewX, s, q);
scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);
a = b = null; // gc
return function(t) {
var i = -1, n = q.length, o;
while (++i < n) s[(o = q[i]).i] = o.x(t);
return s.join("");
};
};
}
var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)");
var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")");
var rho = Math.SQRT2;
var rho2 = 2;
var rho4 = 4;
var epsilon2 = 1e-12;
function cosh(x) {
return ((x = Math.exp(x)) + 1 / x) / 2;
}
function sinh(x) {
return ((x = Math.exp(x)) - 1 / x) / 2;
}
function tanh(x) {
return ((x = Math.exp(2 * x)) - 1) / (x + 1);
}
// p0 = [ux0, uy0, w0]
// p1 = [ux1, uy1, w1]
var interpolateZoom = function(p0, p1) {
var ux0 = p0[0], uy0 = p0[1], w0 = p0[2],
ux1 = p1[0], uy1 = p1[1], w1 = p1[2],
dx = ux1 - ux0,
dy = uy1 - uy0,
d2 = dx * dx + dy * dy,
i,
S;
// Special case for u0 ≅ u1.
if (d2 < epsilon2) {
S = Math.log(w1 / w0) / rho;
i = function(t) {
return [
ux0 + t * dx,
uy0 + t * dy,
w0 * Math.exp(rho * t * S)
];
};
}
// General case.
else {
var d1 = Math.sqrt(d2),
b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),
b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),
r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),
r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);
S = (r1 - r0) / rho;
i = function(t) {
var s = t * S,
coshr0 = cosh(r0),
u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));
return [
ux0 + u * dx,
uy0 + u * dy,
w0 * coshr0 / cosh(rho * s + r0)
];
};
}
i.duration = S * 1000;
return i;
};
function hsl$1(hue$$1) {
return function(start, end) {
var h = hue$$1((start = hsl(start)).h, (end = hsl(end)).h),
s = nogamma(start.s, end.s),
l = nogamma(start.l, end.l),
opacity = nogamma(start.opacity, end.opacity);
return function(t) {
start.h = h(t);
start.s = s(t);
start.l = l(t);
start.opacity = opacity(t);
return start + "";
};
}
}
var hsl$2 = hsl$1(hue);
var hslLong = hsl$1(nogamma);
function lab$1(start, end) {
var l = nogamma((start = lab(start)).l, (end = lab(end)).l),
a = nogamma(start.a, end.a),
b = nogamma(start.b, end.b),
opacity = nogamma(start.opacity, end.opacity);
return function(t) {
start.l = l(t);
start.a = a(t);
start.b = b(t);
start.opacity = opacity(t);
return start + "";
};
}
function hcl$1(hue$$1) {
return function(start, end) {
var h = hue$$1((start = hcl(start)).h, (end = hcl(end)).h),
c = nogamma(start.c, end.c),
l = nogamma(start.l, end.l),
opacity = nogamma(start.opacity, end.opacity);
return function(t) {
start.h = h(t);
start.c = c(t);
start.l = l(t);
start.opacity = opacity(t);
return start + "";
};
}
}
var hcl$2 = hcl$1(hue);
var hclLong = hcl$1(nogamma);
function cubehelix$1(hue$$1) {
return (function cubehelixGamma(y) {
y = +y;
function cubehelix$$1(start, end) {
var h = hue$$1((start = cubehelix(start)).h, (end = cubehelix(end)).h),
s = nogamma(start.s, end.s),
l = nogamma(start.l, end.l),
opacity = nogamma(start.opacity, end.opacity);
return function(t) {
start.h = h(t);
start.s = s(t);
start.l = l(Math.pow(t, y));
start.opacity = opacity(t);
return start + "";
};
}
cubehelix$$1.gamma = cubehelixGamma;
return cubehelix$$1;
})(1);
}
var cubehelix$2 = cubehelix$1(hue);
var cubehelixLong = cubehelix$1(nogamma);
var quantize = function(interpolator, n) {
var samples = new Array(n);
for (var i = 0; i < n; ++i) samples[i] = interpolator(i / (n - 1));
return samples;
};
var frame = 0;
var timeout = 0;
var interval = 0;
var pokeDelay = 1000;
var taskHead;
var taskTail;
var clockLast = 0;
var clockNow = 0;
var clockSkew = 0;
var clock = typeof performance === "object" && performance.now ? performance : Date;
var setFrame = typeof requestAnimationFrame === "function" ? requestAnimationFrame : function(f) { setTimeout(f, 17); };
function now() {
return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);
}
function clearNow() {
clockNow = 0;
}
function Timer() {
this._call =
this._time =
this._next = null;
}
Timer.prototype = timer.prototype = {
constructor: Timer,
restart: function(callback, delay, time) {
if (typeof callback !== "function") throw new TypeError("callback is not a function");
time = (time == null ? now() : +time) + (delay == null ? 0 : +delay);
if (!this._next && taskTail !== this) {
if (taskTail) taskTail._next = this;
else taskHead = this;
taskTail = this;
}
this._call = callback;
this._time = time;
sleep();
},
stop: function() {
if (this._call) {
this._call = null;
this._time = Infinity;
sleep();
}
}
};
function timer(callback, delay, time) {
var t = new Timer;
t.restart(callback, delay, time);
return t;
}
function timerFlush() {
now(); // Get the current time, if not already set.
++frame; // Pretend we’ve set an alarm, if we haven’t already.
var t = taskHead, e;
while (t) {
if ((e = clockNow - t._time) >= 0) t._call.call(null, e);
t = t._next;
}
--frame;
}
function wake() {
clockNow = (clockLast = clock.now()) + clockSkew;
frame = timeout = 0;
try {
timerFlush();
} finally {
frame = 0;
nap();
clockNow = 0;
}
}
function poke() {
var now = clock.now(), delay = now - clockLast;
if (delay > pokeDelay) clockSkew -= delay, clockLast = now;
}
function nap() {
var t0, t1 = taskHead, t2, time = Infinity;
while (t1) {
if (t1._call) {
if (time > t1._time) time = t1._time;
t0 = t1, t1 = t1._next;
} else {
t2 = t1._next, t1._next = null;
t1 = t0 ? t0._next = t2 : taskHead = t2;
}
}
taskTail = t0;
sleep(time);
}
function sleep(time) {
if (frame) return; // Soonest alarm already set, or will be.
if (timeout) timeout = clearTimeout(timeout);
var delay = time - clockNow;
if (delay > 24) {
if (time < Infinity) timeout = setTimeout(wake, delay);
if (interval) interval = clearInterval(interval);
} else {
if (!interval) clockLast = clockNow, interval = setInterval(poke, pokeDelay);
frame = 1, setFrame(wake);
}
}
var timeout$1 = function(callback, delay, time) {
var t = new Timer;
delay = delay == null ? 0 : +delay;
t.restart(function(elapsed) {
t.stop();
callback(elapsed + delay);
}, delay, time);
return t;
};
var interval$1 = function(callback, delay, time) {
var t = new Timer, total = delay;
if (delay == null) return t.restart(callback, delay, time), t;
delay = +delay, time = time == null ? now() : +time;
t.restart(function tick(elapsed) {
elapsed += total;
t.restart(tick, total += delay, time);
callback(elapsed);
}, delay, time);
return t;
};
var emptyOn = dispatch("start", "end", "interrupt");
var emptyTween = [];
var CREATED = 0;
var SCHEDULED = 1;
var STARTING = 2;
var STARTED = 3;
var RUNNING = 4;
var ENDING = 5;
var ENDED = 6;
var schedule = function(node, name, id, index, group, timing) {
var schedules = node.__transition;
if (!schedules) node.__transition = {};
else if (id in schedules) return;
create(node, id, {
name: name,
index: index, // For context during callback.
group: group, // For context during callback.
on: emptyOn,
tween: emptyTween,
time: timing.time,
delay: timing.delay,
duration: timing.duration,
ease: timing.ease,
timer: null,
state: CREATED
});
};
function init(node, id) {
var schedule = node.__transition;
if (!schedule || !(schedule = schedule[id]) || schedule.state > CREATED) throw new Error("too late");
return schedule;
}
function set$1(node, id) {
var schedule = node.__transition;
if (!schedule || !(schedule = schedule[id]) || schedule.state > STARTING) throw new Error("too late");
return schedule;
}
function get$1(node, id) {
var schedule = node.__transition;
if (!schedule || !(schedule = schedule[id])) throw new Error("too late");
return schedule;
}
function create(node, id, self) {
var schedules = node.__transition,
tween;
// Initialize the self timer when the transition is created.
// Note the actual delay is not known until the first callback!
schedules[id] = self;
self.timer = timer(schedule, 0, self.time);
function schedule(elapsed) {
self.state = SCHEDULED;
self.timer.restart(start, self.delay, self.time);
// If the elapsed delay is less than our first sleep, start immediately.
if (self.delay <= elapsed) start(elapsed - self.delay);
}
function start(elapsed) {
var i, j, n, o;
// If the state is not SCHEDULED, then we previously errored on start.
if (self.state !== SCHEDULED) return stop();
for (i in schedules) {
o = schedules[i];
if (o.name !== self.name) continue;
// While this element already has a starting transition during this frame,
// defer starting an interrupting transition until that transition has a
// chance to tick (and possibly end); see d3/d3-transition#54!
if (o.state === STARTED) return timeout$1(start);
// Interrupt the active transition, if any.
// Dispatch the interrupt event.
if (o.state === RUNNING) {
o.state = ENDED;
o.timer.stop();
o.on.call("interrupt", node, node.__data__, o.index, o.group);
delete schedules[i];
}
// Cancel any pre-empted transitions. No interrupt event is dispatched
// because the cancelled transitions never started. Note that this also
// removes this transition from the pending list!
else if (+i < id) {
o.state = ENDED;
o.timer.stop();
delete schedules[i];
}
}
// Defer the first tick to end of the current frame; see d3/d3#1576.
// Note the transition may be canceled after start and before the first tick!
// Note this must be scheduled before the start event; see d3/d3-transition#16!
// Assuming this is successful, subsequent callbacks go straight to tick.
timeout$1(function() {
if (self.state === STARTED) {
self.state = RUNNING;
self.timer.restart(tick, self.delay, self.time);
tick(elapsed);
}
});
// Dispatch the start event.
// Note this must be done before the tween are initialized.
self.state = STARTING;
self.on.call("start", node, node.__data__, self.index, self.group);
if (self.state !== STARTING) return; // interrupted
self.state = STARTED;
// Initialize the tween, deleting null tween.
tween = new Array(n = self.tween.length);
for (i = 0, j = -1; i < n; ++i) {
if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) {
tween[++j] = o;
}
}
tween.length = j + 1;
}
function tick(elapsed) {
var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1),
i = -1,
n = tween.length;
while (++i < n) {
tween[i].call(null, t);
}
// Dispatch the end event.
if (self.state === ENDING) {
self.on.call("end", node, node.__data__, self.index, self.group);
stop();
}
}
function stop() {
self.state = ENDED;
self.timer.stop();
delete schedules[id];
for (var i in schedules) return; // eslint-disable-line no-unused-vars
delete node.__transition;
}
}
var interrupt = function(node, name) {
var schedules = node.__transition,
schedule,
active,
empty = true,
i;
if (!schedules) return;
name = name == null ? null : name + "";
for (i in schedules) {
if ((schedule = schedules[i]).name !== name) { empty = false; continue; }
active = schedule.state > STARTING && schedule.state < ENDING;
schedule.state = ENDED;
schedule.timer.stop();
if (active) schedule.on.call("interrupt", node, node.__data__, schedule.index, schedule.group);
delete schedules[i];
}
if (empty) delete node.__transition;
};
var selection_interrupt = function(name) {
return this.each(function() {
interrupt(this, name);
});
};
function tweenRemove(id, name) {
var tween0, tween1;
return function() {
var schedule = set$1(this, id),
tween = schedule.tween;
// If this node shared tween with the previous node,
// just assign the updated shared tween and we’re done!
// Otherwise, copy-on-write.
if (tween !== tween0) {
tween1 = tween0 = tween;
for (var i = 0, n = tween1.length; i < n; ++i) {
if (tween1[i].name === name) {
tween1 = tween1.slice();
tween1.splice(i, 1);
break;
}
}
}
schedule.tween = tween1;
};
}
function tweenFunction(id, name, value) {
var tween0, tween1;
if (typeof value !== "function") throw new Error;
return function() {
var schedule = set$1(this, id),
tween = schedule.tween;
// If this node shared tween with the previous node,
// just assign the updated shared tween and we’re done!
// Otherwise, copy-on-write.
if (tween !== tween0) {
tween1 = (tween0 = tween).slice();
for (var t = {name: name, value: value}, i = 0, n = tween1.length; i < n; ++i) {
if (tween1[i].name === name) {
tween1[i] = t;
break;
}
}
if (i === n) tween1.push(t);
}
schedule.tween = tween1;
};
}
var transition_tween = function(name, value) {
var id = this._id;
name += "";
if (arguments.length < 2) {
var tween = get$1(this.node(), id).tween;
for (var i = 0, n = tween.length, t; i < n; ++i) {
if ((t = tween[i]).name === name) {
return t.value;
}
}
return null;
}
return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));
};
function tweenValue(transition, name, value) {
var id = transition._id;
transition.each(function() {
var schedule = set$1(this, id);
(schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);
});
return function(node) {
return get$1(node, id).value[name];
};
}
var interpolate$$1 = function(a, b) {
var c;
return (typeof b === "number" ? reinterpolate
: b instanceof color ? interpolateRgb
: (c = color(b)) ? (b = c, interpolateRgb)
: interpolateString)(a, b);
};
function attrRemove$1(name) {
return function() {
this.removeAttribute(name);
};
}
function attrRemoveNS$1(fullname) {
return function() {
this.removeAttributeNS(fullname.space, fullname.local);
};
}
function attrConstant$1(name, interpolate$$1, value1) {
var value00,
interpolate0;
return function() {
var value0 = this.getAttribute(name);
return value0 === value1 ? null
: value0 === value00 ? interpolate0
: interpolate0 = interpolate$$1(value00 = value0, value1);
};
}
function attrConstantNS$1(fullname, interpolate$$1, value1) {
var value00,
interpolate0;
return function() {
var value0 = this.getAttributeNS(fullname.space, fullname.local);
return value0 === value1 ? null
: value0 === value00 ? interpolate0
: interpolate0 = interpolate$$1(value00 = value0, value1);
};
}
function attrFunction$1(name, interpolate$$1, value) {
var value00,
value10,
interpolate0;
return function() {
var value0, value1 = value(this);
if (value1 == null) return void this.removeAttribute(name);
value0 = this.getAttribute(name);
return value0 === value1 ? null
: value0 === value00 && value1 === value10 ? interpolate0
: interpolate0 = interpolate$$1(value00 = value0, value10 = value1);
};
}
function attrFunctionNS$1(fullname, interpolate$$1, value) {
var value00,
value10,
interpolate0;
return function() {
var value0, value1 = value(this);
if (value1 == null) return void this.removeAttributeNS(fullname.space, fullname.local);
value0 = this.getAttributeNS(fullname.space, fullname.local);
return value0 === value1 ? null
: value0 === value00 && value1 === value10 ? interpolate0
: interpolate0 = interpolate$$1(value00 = value0, value10 = value1);
};
}
var transition_attr = function(name, value) {
var fullname = namespace(name), i = fullname === "transform" ? interpolateTransformSvg : interpolate$$1;
return this.attrTween(name, typeof value === "function"
? (fullname.local ? attrFunctionNS$1 : attrFunction$1)(fullname, i, tweenValue(this, "attr." + name, value))
: value == null ? (fullname.local ? attrRemoveNS$1 : attrRemove$1)(fullname)
: (fullname.local ? attrConstantNS$1 : attrConstant$1)(fullname, i, value + ""));
};
function attrTweenNS(fullname, value) {
function tween() {
var node = this, i = value.apply(node, arguments);
return i && function(t) {
node.setAttributeNS(fullname.space, fullname.local, i(t));
};
}
tween._value = value;
return tween;
}
function attrTween(name, value) {
function tween() {
var node = this, i = value.apply(node, arguments);
return i && function(t) {
node.setAttribute(name, i(t));
};
}
tween._value = value;
return tween;
}
var transition_attrTween = function(name, value) {
var key = "attr." + name;
if (arguments.length < 2) return (key = this.tween(key)) && key._value;
if (value == null) return this.tween(key, null);
if (typeof value !== "function") throw new Error;
var fullname = namespace(name);
return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value));
};
function delayFunction(id, value) {
return function() {
init(this, id).delay = +value.apply(this, arguments);
};
}
function delayConstant(id, value) {
return value = +value, function() {
init(this, id).delay = value;
};
}
var transition_delay = function(value) {
var id = this._id;
return arguments.length
? this.each((typeof value === "function"
? delayFunction
: delayConstant)(id, value))
: get$1(this.node(), id).delay;
};
function durationFunction(id, value) {
return function() {
set$1(this, id).duration = +value.apply(this, arguments);
};
}
function durationConstant(id, value) {
return value = +value, function() {
set$1(this, id).duration = value;
};
}
var transition_duration = function(value) {
var id = this._id;
return arguments.length
? this.each((typeof value === "function"
? durationFunction
: durationConstant)(id, value))
: get$1(this.node(), id).duration;
};
function easeConstant(id, value) {
if (typeof value !== "function") throw new Error;
return function() {
set$1(this, id).ease = value;
};
}
var transition_ease = function(value) {
var id = this._id;
return arguments.length
? this.each(easeConstant(id, value))
: get$1(this.node(), id).ease;
};
var transition_filter = function(match) {
if (typeof match !== "function") match = matcher$1(match);
for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
subgroup.push(node);
}
}
}
return new Transition(subgroups, this._parents, this._name, this._id);
};
var transition_merge = function(transition) {
if (transition._id !== this._id) throw new Error;
for (var groups0 = this._groups, groups1 = transition._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
if (node = group0[i] || group1[i]) {
merge[i] = node;
}
}
}
for (; j < m0; ++j) {
merges[j] = groups0[j];
}
return new Transition(merges, this._parents, this._name, this._id);
};
function start(name) {
return (name + "").trim().split(/^|\s+/).every(function(t) {
var i = t.indexOf(".");
if (i >= 0) t = t.slice(0, i);
return !t || t === "start";
});
}
function onFunction(id, name, listener) {
var on0, on1, sit = start(name) ? init : set$1;
return function() {
var schedule = sit(this, id),
on = schedule.on;
// If this node shared a dispatch with the previous node,
// just assign the updated shared dispatch and we’re done!
// Otherwise, copy-on-write.
if (on !== on0) (on1 = (on0 = on).copy()).on(name, listener);
schedule.on = on1;
};
}
var transition_on = function(name, listener) {
var id = this._id;
return arguments.length < 2
? get$1(this.node(), id).on.on(name)
: this.each(onFunction(id, name, listener));
};
function removeFunction(id) {
return function() {
var parent = this.parentNode;
for (var i in this.__transition) if (+i !== id) return;
if (parent) parent.removeChild(this);
};
}
var transition_remove = function() {
return this.on("end.remove", removeFunction(this._id));
};
var transition_select = function(select$$1) {
var name = this._name,
id = this._id;
if (typeof select$$1 !== "function") select$$1 = selector(select$$1);
for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
if ((node = group[i]) && (subnode = select$$1.call(node, node.__data__, i, group))) {
if ("__data__" in node) subnode.__data__ = node.__data__;
subgroup[i] = subnode;
schedule(subgroup[i], name, id, i, subgroup, get$1(node, id));
}
}
}
return new Transition(subgroups, this._parents, name, id);
};
var transition_selectAll = function(select$$1) {
var name = this._name,
id = this._id;
if (typeof select$$1 !== "function") select$$1 = selectorAll(select$$1);
for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
if (node = group[i]) {
for (var children = select$$1.call(node, node.__data__, i, group), child, inherit = get$1(node, id), k = 0, l = children.length; k < l; ++k) {
if (child = children[k]) {
schedule(child, name, id, k, children, inherit);
}
}
subgroups.push(children);
parents.push(node);
}
}
}
return new Transition(subgroups, parents, name, id);
};
var Selection$1 = selection.prototype.constructor;
var transition_selection = function() {
return new Selection$1(this._groups, this._parents);
};
function styleRemove$1(name, interpolate$$2) {
var value00,
value10,
interpolate0;
return function() {
var value0 = styleValue(this, name),
value1 = (this.style.removeProperty(name), styleValue(this, name));
return value0 === value1 ? null
: value0 === value00 && value1 === value10 ? interpolate0
: interpolate0 = interpolate$$2(value00 = value0, value10 = value1);
};
}
function styleRemoveEnd(name) {
return function() {
this.style.removeProperty(name);
};
}
function styleConstant$1(name, interpolate$$2, value1) {
var value00,
interpolate0;
return function() {
var value0 = styleValue(this, name);
return value0 === value1 ? null
: value0 === value00 ? interpolate0
: interpolate0 = interpolate$$2(value00 = value0, value1);
};
}
function styleFunction$1(name, interpolate$$2, value) {
var value00,
value10,
interpolate0;
return function() {
var value0 = styleValue(this, name),
value1 = value(this);
if (value1 == null) value1 = (this.style.removeProperty(name), styleValue(this, name));
return value0 === value1 ? null
: value0 === value00 && value1 === value10 ? interpolate0
: interpolate0 = interpolate$$2(value00 = value0, value10 = value1);
};
}
var transition_style = function(name, value, priority) {
var i = (name += "") === "transform" ? interpolateTransformCss : interpolate$$1;
return value == null ? this
.styleTween(name, styleRemove$1(name, i))
.on("end.style." + name, styleRemoveEnd(name))
: this.styleTween(name, typeof value === "function"
? styleFunction$1(name, i, tweenValue(this, "style." + name, value))
: styleConstant$1(name, i, value + ""), priority);
};
function styleTween(name, value, priority) {
function tween() {
var node = this, i = value.apply(node, arguments);
return i && function(t) {
node.style.setProperty(name, i(t), priority);
};
}
tween._value = value;
return tween;
}
var transition_styleTween = function(name, value, priority) {
var key = "style." + (name += "");
if (arguments.length < 2) return (key = this.tween(key)) && key._value;
if (value == null) return this.tween(key, null);
if (typeof value !== "function") throw new Error;
return this.tween(key, styleTween(name, value, priority == null ? "" : priority));
};
function textConstant$1(value) {
return function() {
this.textContent = value;
};
}
function textFunction$1(value) {
return function() {
var value1 = value(this);
this.textContent = value1 == null ? "" : value1;
};
}
var transition_text = function(value) {
return this.tween("text", typeof value === "function"
? textFunction$1(tweenValue(this, "text", value))
: textConstant$1(value == null ? "" : value + ""));
};
var transition_transition = function() {
var name = this._name,
id0 = this._id,
id1 = newId();
for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
if (node = group[i]) {
var inherit = get$1(node, id0);
schedule(node, name, id1, i, group, {
time: inherit.time + inherit.delay + inherit.duration,
delay: 0,
duration: inherit.duration,
ease: inherit.ease
});
}
}
}
return new Transition(groups, this._parents, name, id1);
};
var id = 0;
function Transition(groups, parents, name, id) {
this._groups = groups;
this._parents = parents;
this._name = name;
this._id = id;
}
function transition(name) {
return selection().transition(name);
}
function newId() {
return ++id;
}
var selection_prototype = selection.prototype;
Transition.prototype = transition.prototype = {
constructor: Transition,
select: transition_select,
selectAll: transition_selectAll,
filter: transition_filter,
merge: transition_merge,
selection: transition_selection,
transition: transition_transition,
call: selection_prototype.call,
nodes: selection_prototype.nodes,
node: selection_prototype.node,
size: selection_prototype.size,
empty: selection_prototype.empty,
each: selection_prototype.each,
on: transition_on,
attr: transition_attr,
attrTween: transition_attrTween,
style: transition_style,
styleTween: transition_styleTween,
text: transition_text,
remove: transition_remove,
tween: transition_tween,
delay: transition_delay,
duration: transition_duration,
ease: transition_ease
};
function linear$1(t) {
return +t;
}
function quadIn(t) {
return t * t;
}
function quadOut(t) {
return t * (2 - t);
}
function quadInOut(t) {
return ((t *= 2) <= 1 ? t * t : --t * (2 - t) + 1) / 2;
}
function cubicIn(t) {
return t * t * t;
}
function cubicOut(t) {
return --t * t * t + 1;
}
function cubicInOut(t) {
return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;
}
var exponent = 3;
var polyIn = (function custom(e) {
e = +e;
function polyIn(t) {
return Math.pow(t, e);
}
polyIn.exponent = custom;
return polyIn;
})(exponent);
var polyOut = (function custom(e) {
e = +e;
function polyOut(t) {
return 1 - Math.pow(1 - t, e);
}
polyOut.exponent = custom;
return polyOut;
})(exponent);
var polyInOut = (function custom(e) {
e = +e;
function polyInOut(t) {
return ((t *= 2) <= 1 ? Math.pow(t, e) : 2 - Math.pow(2 - t, e)) / 2;
}
polyInOut.exponent = custom;
return polyInOut;
})(exponent);
var pi = Math.PI;
var halfPi = pi / 2;
function sinIn(t) {
return 1 - Math.cos(t * halfPi);
}
function sinOut(t) {
return Math.sin(t * halfPi);
}
function sinInOut(t) {
return (1 - Math.cos(pi * t)) / 2;
}
function expIn(t) {
return Math.pow(2, 10 * t - 10);
}
function expOut(t) {
return 1 - Math.pow(2, -10 * t);
}
function expInOut(t) {
return ((t *= 2) <= 1 ? Math.pow(2, 10 * t - 10) : 2 - Math.pow(2, 10 - 10 * t)) / 2;
}
function circleIn(t) {
return 1 - Math.sqrt(1 - t * t);
}
function circleOut(t) {
return Math.sqrt(1 - --t * t);
}
function circleInOut(t) {
return ((t *= 2) <= 1 ? 1 - Math.sqrt(1 - t * t) : Math.sqrt(1 - (t -= 2) * t) + 1) / 2;
}
var b1 = 4 / 11;
var b2 = 6 / 11;
var b3 = 8 / 11;
var b4 = 3 / 4;
var b5 = 9 / 11;
var b6 = 10 / 11;
var b7 = 15 / 16;
var b8 = 21 / 22;
var b9 = 63 / 64;
var b0 = 1 / b1 / b1;
function bounceIn(t) {
return 1 - bounceOut(1 - t);
}
function bounceOut(t) {
return (t = +t) < b1 ? b0 * t * t : t < b3 ? b0 * (t -= b2) * t + b4 : t < b6 ? b0 * (t -= b5) * t + b7 : b0 * (t -= b8) * t + b9;
}
function bounceInOut(t) {
return ((t *= 2) <= 1 ? 1 - bounceOut(1 - t) : bounceOut(t - 1) + 1) / 2;
}
var overshoot = 1.70158;
var backIn = (function custom(s) {
s = +s;
function backIn(t) {
return t * t * ((s + 1) * t - s);
}
backIn.overshoot = custom;
return backIn;
})(overshoot);
var backOut = (function custom(s) {
s = +s;
function backOut(t) {
return --t * t * ((s + 1) * t + s) + 1;
}
backOut.overshoot = custom;
return backOut;
})(overshoot);
var backInOut = (function custom(s) {
s = +s;
function backInOut(t) {
return ((t *= 2) < 1 ? t * t * ((s + 1) * t - s) : (t -= 2) * t * ((s + 1) * t + s) + 2) / 2;
}
backInOut.overshoot = custom;
return backInOut;
})(overshoot);
var tau = 2 * Math.PI;
var amplitude = 1;
var period = 0.3;
var elasticIn = (function custom(a, p) {
var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);
function elasticIn(t) {
return a * Math.pow(2, 10 * --t) * Math.sin((s - t) / p);
}
elasticIn.amplitude = function(a) { return custom(a, p * tau); };
elasticIn.period = function(p) { return custom(a, p); };
return elasticIn;
})(amplitude, period);
var elasticOut = (function custom(a, p) {
var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);
function elasticOut(t) {
return 1 - a * Math.pow(2, -10 * (t = +t)) * Math.sin((t + s) / p);
}
elasticOut.amplitude = function(a) { return custom(a, p * tau); };
elasticOut.period = function(p) { return custom(a, p); };
return elasticOut;
})(amplitude, period);
var elasticInOut = (function custom(a, p) {
var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);
function elasticInOut(t) {
return ((t = t * 2 - 1) < 0
? a * Math.pow(2, 10 * t) * Math.sin((s - t) / p)
: 2 - a * Math.pow(2, -10 * t) * Math.sin((s + t) / p)) / 2;
}
elasticInOut.amplitude = function(a) { return custom(a, p * tau); };
elasticInOut.period = function(p) { return custom(a, p); };
return elasticInOut;
})(amplitude, period);
var defaultTiming = {
time: null, // Set on use.
delay: 0,
duration: 250,
ease: cubicInOut
};
function inherit(node, id) {
var timing;
while (!(timing = node.__transition) || !(timing = timing[id])) {
if (!(node = node.parentNode)) {
return defaultTiming.time = now(), defaultTiming;
}
}
return timing;
}
var selection_transition = function(name) {
var id,
timing;
if (name instanceof Transition) {
id = name._id, name = name._name;
} else {
id = newId(), (timing = defaultTiming).time = now(), name = name == null ? null : name + "";
}
for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
if (node = group[i]) {
schedule(node, name, id, i, group, timing || inherit(node, id));
}
}
}
return new Transition(groups, this._parents, name, id);
};
selection.prototype.interrupt = selection_interrupt;
selection.prototype.transition = selection_transition;
var root$1 = [null];
var active = function(node, name) {
var schedules = node.__transition,
schedule,
i;
if (schedules) {
name = name == null ? null : name + "";
for (i in schedules) {
if ((schedule = schedules[i]).state > SCHEDULED && schedule.name === name) {
return new Transition([[node]], root$1, name, +i);
}
}
}
return null;
};
var constant$4 = function(x) {
return function() {
return x;
};
};
var BrushEvent = function(target, type, selection) {
this.target = target;
this.type = type;
this.selection = selection;
};
function nopropagation$1() {
exports.event.stopImmediatePropagation();
}
var noevent$1 = function() {
exports.event.preventDefault();
exports.event.stopImmediatePropagation();
};
var MODE_DRAG = {name: "drag"};
var MODE_SPACE = {name: "space"};
var MODE_HANDLE = {name: "handle"};
var MODE_CENTER = {name: "center"};
var X = {
name: "x",
handles: ["e", "w"].map(type),
input: function(x, e) { return x && [[x[0], e[0][1]], [x[1], e[1][1]]]; },
output: function(xy) { return xy && [xy[0][0], xy[1][0]]; }
};
var Y = {
name: "y",
handles: ["n", "s"].map(type),
input: function(y, e) { return y && [[e[0][0], y[0]], [e[1][0], y[1]]]; },
output: function(xy) { return xy && [xy[0][1], xy[1][1]]; }
};
var XY = {
name: "xy",
handles: ["n", "e", "s", "w", "nw", "ne", "se", "sw"].map(type),
input: function(xy) { return xy; },
output: function(xy) { return xy; }
};
var cursors = {
overlay: "crosshair",
selection: "move",
n: "ns-resize",
e: "ew-resize",
s: "ns-resize",
w: "ew-resize",
nw: "nwse-resize",
ne: "nesw-resize",
se: "nwse-resize",
sw: "nesw-resize"
};
var flipX = {
e: "w",
w: "e",
nw: "ne",
ne: "nw",
se: "sw",
sw: "se"
};
var flipY = {
n: "s",
s: "n",
nw: "sw",
ne: "se",
se: "ne",
sw: "nw"
};
var signsX = {
overlay: +1,
selection: +1,
n: null,
e: +1,
s: null,
w: -1,
nw: -1,
ne: +1,
se: +1,
sw: -1
};
var signsY = {
overlay: +1,
selection: +1,
n: -1,
e: null,
s: +1,
w: null,
nw: -1,
ne: -1,
se: +1,
sw: +1
};
function type(t) {
return {type: t};
}
// Ignore right-click, since that should open the context menu.
function defaultFilter() {
return !exports.event.button;
}
function defaultExtent() {
var svg = this.ownerSVGElement || this;
return [[0, 0], [svg.width.baseVal.value, svg.height.baseVal.value]];
}
// Like d3.local, but with the name “__brush” rather than auto-generated.
function local$$1(node) {
while (!node.__brush) if (!(node = node.parentNode)) return;
return node.__brush;
}
function empty(extent) {
return extent[0][0] === extent[1][0]
|| extent[0][1] === extent[1][1];
}
function brushSelection(node) {
var state = node.__brush;
return state ? state.dim.output(state.selection) : null;
}
function brushX() {
return brush$1(X);
}
function brushY() {
return brush$1(Y);
}
var brush = function() {
return brush$1(XY);
};
function brush$1(dim) {
var extent = defaultExtent,
filter = defaultFilter,
listeners = dispatch(brush, "start", "brush", "end"),
handleSize = 6,
touchending;
function brush(group) {
var overlay = group
.property("__brush", initialize)
.selectAll(".overlay")
.data([type("overlay")]);
overlay.enter().append("rect")
.attr("class", "overlay")
.attr("pointer-events", "all")
.attr("cursor", cursors.overlay)
.merge(overlay)
.each(function() {
var extent = local$$1(this).extent;
select(this)
.attr("x", extent[0][0])
.attr("y", extent[0][1])
.attr("width", extent[1][0] - extent[0][0])
.attr("height", extent[1][1] - extent[0][1]);
});
group.selectAll(".selection")
.data([type("selection")])
.enter().append("rect")
.attr("class", "selection")
.attr("cursor", cursors.selection)
.attr("fill", "#777")
.attr("fill-opacity", 0.3)
.attr("stroke", "#fff")
.attr("shape-rendering", "crispEdges");
var handle = group.selectAll(".handle")
.data(dim.handles, function(d) { return d.type; });
handle.exit().remove();
handle.enter().append("rect")
.attr("class", function(d) { return "handle handle--" + d.type; })
.attr("cursor", function(d) { return cursors[d.type]; });
group
.each(redraw)
.attr("fill", "none")
.attr("pointer-events", "all")
.style("-webkit-tap-highlight-color", "rgba(0,0,0,0)")
.on("mousedown.brush touchstart.brush", started);
}
brush.move = function(group, selection$$1) {
if (group.selection) {
group
.on("start.brush", function() { emitter(this, arguments).beforestart().start(); })
.on("interrupt.brush end.brush", function() { emitter(this, arguments).end(); })
.tween("brush", function() {
var that = this,
state = that.__brush,
emit = emitter(that, arguments),
selection0 = state.selection,
selection1 = dim.input(typeof selection$$1 === "function" ? selection$$1.apply(this, arguments) : selection$$1, state.extent),
i = interpolateValue(selection0, selection1);
function tween(t) {
state.selection = t === 1 && empty(selection1) ? null : i(t);
redraw.call(that);
emit.brush();
}
return selection0 && selection1 ? tween : tween(1);
});
} else {
group
.each(function() {
var that = this,
args = arguments,
state = that.__brush,
selection1 = dim.input(typeof selection$$1 === "function" ? selection$$1.apply(that, args) : selection$$1, state.extent),
emit = emitter(that, args).beforestart();
interrupt(that);
state.selection = selection1 == null || empty(selection1) ? null : selection1;
redraw.call(that);
emit.start().brush().end();
});
}
};
function redraw() {
var group = select(this),
selection$$1 = local$$1(this).selection;
if (selection$$1) {
group.selectAll(".selection")
.style("display", null)
.attr("x", selection$$1[0][0])
.attr("y", selection$$1[0][1])
.attr("width", selection$$1[1][0] - selection$$1[0][0])
.attr("height", selection$$1[1][1] - selection$$1[0][1]);
group.selectAll(".handle")
.style("display", null)
.attr("x", function(d) { return d.type[d.type.length - 1] === "e" ? selection$$1[1][0] - handleSize / 2 : selection$$1[0][0] - handleSize / 2; })
.attr("y", function(d) { return d.type[0] === "s" ? selection$$1[1][1] - handleSize / 2 : selection$$1[0][1] - handleSize / 2; })
.attr("width", function(d) { return d.type === "n" || d.type === "s" ? selection$$1[1][0] - selection$$1[0][0] + handleSize : handleSize; })
.attr("height", function(d) { return d.type === "e" || d.type === "w" ? selection$$1[1][1] - selection$$1[0][1] + handleSize : handleSize; });
}
else {
group.selectAll(".selection,.handle")
.style("display", "none")
.attr("x", null)
.attr("y", null)
.attr("width", null)
.attr("height", null);
}
}
function emitter(that, args) {
return that.__brush.emitter || new Emitter(that, args);
}
function Emitter(that, args) {
this.that = that;
this.args = args;
this.state = that.__brush;
this.active = 0;
}
Emitter.prototype = {
beforestart: function() {
if (++this.active === 1) this.state.emitter = this, this.starting = true;
return this;
},
start: function() {
if (this.starting) this.starting = false, this.emit("start");
return this;
},
brush: function() {
this.emit("brush");
return this;
},
end: function() {
if (--this.active === 0) delete this.state.emitter, this.emit("end");
return this;
},
emit: function(type) {
customEvent(new BrushEvent(brush, type, dim.output(this.state.selection)), listeners.apply, listeners, [type, this.that, this.args]);
}
};
function started() {
if (exports.event.touches) { if (exports.event.changedTouches.length < exports.event.touches.length) return noevent$1(); }
else if (touchending) return;
if (!filter.apply(this, arguments)) return;
var that = this,
type = exports.event.target.__data__.type,
mode = (exports.event.metaKey ? type = "overlay" : type) === "selection" ? MODE_DRAG : (exports.event.altKey ? MODE_CENTER : MODE_HANDLE),
signX = dim === Y ? null : signsX[type],
signY = dim === X ? null : signsY[type],
state = local$$1(that),
extent = state.extent,
selection$$1 = state.selection,
W = extent[0][0], w0, w1,
N = extent[0][1], n0, n1,
E = extent[1][0], e0, e1,
S = extent[1][1], s0, s1,
dx,
dy,
moving,
shifting = signX && signY && exports.event.shiftKey,
lockX,
lockY,
point0 = mouse(that),
point = point0,
emit = emitter(that, arguments).beforestart();
if (type === "overlay") {
state.selection = selection$$1 = [
[w0 = dim === Y ? W : point0[0], n0 = dim === X ? N : point0[1]],
[e0 = dim === Y ? E : w0, s0 = dim === X ? S : n0]
];
} else {
w0 = selection$$1[0][0];
n0 = selection$$1[0][1];
e0 = selection$$1[1][0];
s0 = selection$$1[1][1];
}
w1 = w0;
n1 = n0;
e1 = e0;
s1 = s0;
var group = select(that)
.attr("pointer-events", "none");
var overlay = group.selectAll(".overlay")
.attr("cursor", cursors[type]);
if (exports.event.touches) {
group
.on("touchmove.brush", moved, true)
.on("touchend.brush touchcancel.brush", ended, true);
} else {
var view = select(exports.event.view)
.on("keydown.brush", keydowned, true)
.on("keyup.brush", keyupped, true)
.on("mousemove.brush", moved, true)
.on("mouseup.brush", ended, true);
dragDisable(exports.event.view);
}
nopropagation$1();
interrupt(that);
redraw.call(that);
emit.start();
function moved() {
var point1 = mouse(that);
if (shifting && !lockX && !lockY) {
if (Math.abs(point1[0] - point[0]) > Math.abs(point1[1] - point[1])) lockY = true;
else lockX = true;
}
point = point1;
moving = true;
noevent$1();
move();
}
function move() {
var t;
dx = point[0] - point0[0];
dy = point[1] - point0[1];
switch (mode) {
case MODE_SPACE:
case MODE_DRAG: {
if (signX) dx = Math.max(W - w0, Math.min(E - e0, dx)), w1 = w0 + dx, e1 = e0 + dx;
if (signY) dy = Math.max(N - n0, Math.min(S - s0, dy)), n1 = n0 + dy, s1 = s0 + dy;
break;
}
case MODE_HANDLE: {
if (signX < 0) dx = Math.max(W - w0, Math.min(E - w0, dx)), w1 = w0 + dx, e1 = e0;
else if (signX > 0) dx = Math.max(W - e0, Math.min(E - e0, dx)), w1 = w0, e1 = e0 + dx;
if (signY < 0) dy = Math.max(N - n0, Math.min(S - n0, dy)), n1 = n0 + dy, s1 = s0;
else if (signY > 0) dy = Math.max(N - s0, Math.min(S - s0, dy)), n1 = n0, s1 = s0 + dy;
break;
}
case MODE_CENTER: {
if (signX) w1 = Math.max(W, Math.min(E, w0 - dx * signX)), e1 = Math.max(W, Math.min(E, e0 + dx * signX));
if (signY) n1 = Math.max(N, Math.min(S, n0 - dy * signY)), s1 = Math.max(N, Math.min(S, s0 + dy * signY));
break;
}
}
if (e1 < w1) {
signX *= -1;
t = w0, w0 = e0, e0 = t;
t = w1, w1 = e1, e1 = t;
if (type in flipX) overlay.attr("cursor", cursors[type = flipX[type]]);
}
if (s1 < n1) {
signY *= -1;
t = n0, n0 = s0, s0 = t;
t = n1, n1 = s1, s1 = t;
if (type in flipY) overlay.attr("cursor", cursors[type = flipY[type]]);
}
if (state.selection) selection$$1 = state.selection; // May be set by brush.move!
if (lockX) w1 = selection$$1[0][0], e1 = selection$$1[1][0];
if (lockY) n1 = selection$$1[0][1], s1 = selection$$1[1][1];
if (selection$$1[0][0] !== w1
|| selection$$1[0][1] !== n1
|| selection$$1[1][0] !== e1
|| selection$$1[1][1] !== s1) {
state.selection = [[w1, n1], [e1, s1]];
redraw.call(that);
emit.brush();
}
}
function ended() {
nopropagation$1();
if (exports.event.touches) {
if (exports.event.touches.length) return;
if (touchending) clearTimeout(touchending);
touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!
group.on("touchmove.brush touchend.brush touchcancel.brush", null);
} else {
yesdrag(exports.event.view, moving);
view.on("keydown.brush keyup.brush mousemove.brush mouseup.brush", null);
}
group.attr("pointer-events", "all");
overlay.attr("cursor", cursors.overlay);
if (state.selection) selection$$1 = state.selection; // May be set by brush.move (on start)!
if (empty(selection$$1)) state.selection = null, redraw.call(that);
emit.end();
}
function keydowned() {
switch (exports.event.keyCode) {
case 16: { // SHIFT
shifting = signX && signY;
break;
}
case 18: { // ALT
if (mode === MODE_HANDLE) {
if (signX) e0 = e1 - dx * signX, w0 = w1 + dx * signX;
if (signY) s0 = s1 - dy * signY, n0 = n1 + dy * signY;
mode = MODE_CENTER;
move();
}
break;
}
case 32: { // SPACE; takes priority over ALT
if (mode === MODE_HANDLE || mode === MODE_CENTER) {
if (signX < 0) e0 = e1 - dx; else if (signX > 0) w0 = w1 - dx;
if (signY < 0) s0 = s1 - dy; else if (signY > 0) n0 = n1 - dy;
mode = MODE_SPACE;
overlay.attr("cursor", cursors.selection);
move();
}
break;
}
default: return;
}
noevent$1();
}
function keyupped() {
switch (exports.event.keyCode) {
case 16: { // SHIFT
if (shifting) {
lockX = lockY = shifting = false;
move();
}
break;
}
case 18: { // ALT
if (mode === MODE_CENTER) {
if (signX < 0) e0 = e1; else if (signX > 0) w0 = w1;
if (signY < 0) s0 = s1; else if (signY > 0) n0 = n1;
mode = MODE_HANDLE;
move();
}
break;
}
case 32: { // SPACE
if (mode === MODE_SPACE) {
if (exports.event.altKey) {
if (signX) e0 = e1 - dx * signX, w0 = w1 + dx * signX;
if (signY) s0 = s1 - dy * signY, n0 = n1 + dy * signY;
mode = MODE_CENTER;
} else {
if (signX < 0) e0 = e1; else if (signX > 0) w0 = w1;
if (signY < 0) s0 = s1; else if (signY > 0) n0 = n1;
mode = MODE_HANDLE;
}
overlay.attr("cursor", cursors[type]);
move();
}
break;
}
default: return;
}
noevent$1();
}
}
function initialize() {
var state = this.__brush || {selection: null};
state.extent = extent.apply(this, arguments);
state.dim = dim;
return state;
}
brush.extent = function(_) {
return arguments.length ? (extent = typeof _ === "function" ? _ : constant$4([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), brush) : extent;
};
brush.filter = function(_) {
return arguments.length ? (filter = typeof _ === "function" ? _ : constant$4(!!_), brush) : filter;
};
brush.handleSize = function(_) {
return arguments.length ? (handleSize = +_, brush) : handleSize;
};
brush.on = function() {
var value = listeners.on.apply(listeners, arguments);
return value === listeners ? brush : value;
};
return brush;
}
var cos = Math.cos;
var sin = Math.sin;
var pi$1 = Math.PI;
var halfPi$1 = pi$1 / 2;
var tau$1 = pi$1 * 2;
var max$1 = Math.max;
function compareValue(compare) {
return function(a, b) {
return compare(
a.source.value + a.target.value,
b.source.value + b.target.value
);
};
}
var chord = function() {
var padAngle = 0,
sortGroups = null,
sortSubgroups = null,
sortChords = null;
function chord(matrix) {
var n = matrix.length,
groupSums = [],
groupIndex = sequence(n),
subgroupIndex = [],
chords = [],
groups = chords.groups = new Array(n),
subgroups = new Array(n * n),
k,
x,
x0,
dx,
i,
j;
// Compute the sum.
k = 0, i = -1; while (++i < n) {
x = 0, j = -1; while (++j < n) {
x += matrix[i][j];
}
groupSums.push(x);
subgroupIndex.push(sequence(n));
k += x;
}
// Sort groups…
if (sortGroups) groupIndex.sort(function(a, b) {
return sortGroups(groupSums[a], groupSums[b]);
});
// Sort subgroups…
if (sortSubgroups) subgroupIndex.forEach(function(d, i) {
d.sort(function(a, b) {
return sortSubgroups(matrix[i][a], matrix[i][b]);
});
});
// Convert the sum to scaling factor for [0, 2pi].
// TODO Allow start and end angle to be specified?
// TODO Allow padding to be specified as percentage?
k = max$1(0, tau$1 - padAngle * n) / k;
dx = k ? padAngle : tau$1 / n;
// Compute the start and end angle for each group and subgroup.
// Note: Opera has a bug reordering object literal properties!
x = 0, i = -1; while (++i < n) {
x0 = x, j = -1; while (++j < n) {
var di = groupIndex[i],
dj = subgroupIndex[di][j],
v = matrix[di][dj],
a0 = x,
a1 = x += v * k;
subgroups[dj * n + di] = {
index: di,
subindex: dj,
startAngle: a0,
endAngle: a1,
value: v
};
}
groups[di] = {
index: di,
startAngle: x0,
endAngle: x,
value: groupSums[di]
};
x += dx;
}
// Generate chords for each (non-empty) subgroup-subgroup link.
i = -1; while (++i < n) {
j = i - 1; while (++j < n) {
var source = subgroups[j * n + i],
target = subgroups[i * n + j];
if (source.value || target.value) {
chords.push(source.value < target.value
? {source: target, target: source}
: {source: source, target: target});
}
}
}
return sortChords ? chords.sort(sortChords) : chords;
}
chord.padAngle = function(_) {
return arguments.length ? (padAngle = max$1(0, _), chord) : padAngle;
};
chord.sortGroups = function(_) {
return arguments.length ? (sortGroups = _, chord) : sortGroups;
};
chord.sortSubgroups = function(_) {
return arguments.length ? (sortSubgroups = _, chord) : sortSubgroups;
};
chord.sortChords = function(_) {
return arguments.length ? (_ == null ? sortChords = null : (sortChords = compareValue(_))._ = _, chord) : sortChords && sortChords._;
};
return chord;
};
var slice$2 = Array.prototype.slice;
var constant$5 = function(x) {
return function() {
return x;
};
};
var pi$2 = Math.PI;
var tau$2 = 2 * pi$2;
var epsilon$1 = 1e-6;
var tauEpsilon = tau$2 - epsilon$1;
function Path() {
this._x0 = this._y0 = // start of current subpath
this._x1 = this._y1 = null; // end of current subpath
this._ = "";
}
function path() {
return new Path;
}
Path.prototype = path.prototype = {
constructor: Path,
moveTo: function(x, y) {
this._ += "M" + (this._x0 = this._x1 = +x) + "," + (this._y0 = this._y1 = +y);
},
closePath: function() {
if (this._x1 !== null) {
this._x1 = this._x0, this._y1 = this._y0;
this._ += "Z";
}
},
lineTo: function(x, y) {
this._ += "L" + (this._x1 = +x) + "," + (this._y1 = +y);
},
quadraticCurveTo: function(x1, y1, x, y) {
this._ += "Q" + (+x1) + "," + (+y1) + "," + (this._x1 = +x) + "," + (this._y1 = +y);
},
bezierCurveTo: function(x1, y1, x2, y2, x, y) {
this._ += "C" + (+x1) + "," + (+y1) + "," + (+x2) + "," + (+y2) + "," + (this._x1 = +x) + "," + (this._y1 = +y);
},
arcTo: function(x1, y1, x2, y2, r) {
x1 = +x1, y1 = +y1, x2 = +x2, y2 = +y2, r = +r;
var x0 = this._x1,
y0 = this._y1,
x21 = x2 - x1,
y21 = y2 - y1,
x01 = x0 - x1,
y01 = y0 - y1,
l01_2 = x01 * x01 + y01 * y01;
// Is the radius negative? Error.
if (r < 0) throw new Error("negative radius: " + r);
// Is this path empty? Move to (x1,y1).
if (this._x1 === null) {
this._ += "M" + (this._x1 = x1) + "," + (this._y1 = y1);
}
// Or, is (x1,y1) coincident with (x0,y0)? Do nothing.
else if (!(l01_2 > epsilon$1)) {}
// Or, are (x0,y0), (x1,y1) and (x2,y2) collinear?
// Equivalently, is (x1,y1) coincident with (x2,y2)?
// Or, is the radius zero? Line to (x1,y1).
else if (!(Math.abs(y01 * x21 - y21 * x01) > epsilon$1) || !r) {
this._ += "L" + (this._x1 = x1) + "," + (this._y1 = y1);
}
// Otherwise, draw an arc!
else {
var x20 = x2 - x0,
y20 = y2 - y0,
l21_2 = x21 * x21 + y21 * y21,
l20_2 = x20 * x20 + y20 * y20,
l21 = Math.sqrt(l21_2),
l01 = Math.sqrt(l01_2),
l = r * Math.tan((pi$2 - Math.acos((l21_2 + l01_2 - l20_2) / (2 * l21 * l01))) / 2),
t01 = l / l01,
t21 = l / l21;
// If the start tangent is not coincident with (x0,y0), line to.
if (Math.abs(t01 - 1) > epsilon$1) {
this._ += "L" + (x1 + t01 * x01) + "," + (y1 + t01 * y01);
}
this._ += "A" + r + "," + r + ",0,0," + (+(y01 * x20 > x01 * y20)) + "," + (this._x1 = x1 + t21 * x21) + "," + (this._y1 = y1 + t21 * y21);
}
},
arc: function(x, y, r, a0, a1, ccw) {
x = +x, y = +y, r = +r;
var dx = r * Math.cos(a0),
dy = r * Math.sin(a0),
x0 = x + dx,
y0 = y + dy,
cw = 1 ^ ccw,
da = ccw ? a0 - a1 : a1 - a0;
// Is the radius negative? Error.
if (r < 0) throw new Error("negative radius: " + r);
// Is this path empty? Move to (x0,y0).
if (this._x1 === null) {
this._ += "M" + x0 + "," + y0;
}
// Or, is (x0,y0) not coincident with the previous point? Line to (x0,y0).
else if (Math.abs(this._x1 - x0) > epsilon$1 || Math.abs(this._y1 - y0) > epsilon$1) {
this._ += "L" + x0 + "," + y0;
}
// Is this arc empty? We’re done.
if (!r) return;
// Does the angle go the wrong way? Flip the direction.
if (da < 0) da = da % tau$2 + tau$2;
// Is this a complete circle? Draw two arcs to complete the circle.
if (da > tauEpsilon) {
this._ += "A" + r + "," + r + ",0,1," + cw + "," + (x - dx) + "," + (y - dy) + "A" + r + "," + r + ",0,1," + cw + "," + (this._x1 = x0) + "," + (this._y1 = y0);
}
// Is this arc non-empty? Draw an arc!
else if (da > epsilon$1) {
this._ += "A" + r + "," + r + ",0," + (+(da >= pi$2)) + "," + cw + "," + (this._x1 = x + r * Math.cos(a1)) + "," + (this._y1 = y + r * Math.sin(a1));
}
},
rect: function(x, y, w, h) {
this._ += "M" + (this._x0 = this._x1 = +x) + "," + (this._y0 = this._y1 = +y) + "h" + (+w) + "v" + (+h) + "h" + (-w) + "Z";
},
toString: function() {
return this._;
}
};
function defaultSource(d) {
return d.source;
}
function defaultTarget(d) {
return d.target;
}
function defaultRadius(d) {
return d.radius;
}
function defaultStartAngle(d) {
return d.startAngle;
}
function defaultEndAngle(d) {
return d.endAngle;
}
var ribbon = function() {
var source = defaultSource,
target = defaultTarget,
radius = defaultRadius,
startAngle = defaultStartAngle,
endAngle = defaultEndAngle,
context = null;
function ribbon() {
var buffer,
argv = slice$2.call(arguments),
s = source.apply(this, argv),
t = target.apply(this, argv),
sr = +radius.apply(this, (argv[0] = s, argv)),
sa0 = startAngle.apply(this, argv) - halfPi$1,
sa1 = endAngle.apply(this, argv) - halfPi$1,
sx0 = sr * cos(sa0),
sy0 = sr * sin(sa0),
tr = +radius.apply(this, (argv[0] = t, argv)),
ta0 = startAngle.apply(this, argv) - halfPi$1,
ta1 = endAngle.apply(this, argv) - halfPi$1;
if (!context) context = buffer = path();
context.moveTo(sx0, sy0);
context.arc(0, 0, sr, sa0, sa1);
if (sa0 !== ta0 || sa1 !== ta1) { // TODO sr !== tr?
context.quadraticCurveTo(0, 0, tr * cos(ta0), tr * sin(ta0));
context.arc(0, 0, tr, ta0, ta1);
}
context.quadraticCurveTo(0, 0, sx0, sy0);
context.closePath();
if (buffer) return context = null, buffer + "" || null;
}
ribbon.radius = function(_) {
return arguments.length ? (radius = typeof _ === "function" ? _ : constant$5(+_), ribbon) : radius;
};
ribbon.startAngle = function(_) {
return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$5(+_), ribbon) : startAngle;
};
ribbon.endAngle = function(_) {
return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$5(+_), ribbon) : endAngle;
};
ribbon.source = function(_) {
return arguments.length ? (source = _, ribbon) : source;
};
ribbon.target = function(_) {
return arguments.length ? (target = _, ribbon) : target;
};
ribbon.context = function(_) {
return arguments.length ? ((context = _ == null ? null : _), ribbon) : context;
};
return ribbon;
};
var prefix = "$";
function Map() {}
Map.prototype = map$1.prototype = {
constructor: Map,
has: function(key) {
return (prefix + key) in this;
},
get: function(key) {
return this[prefix + key];
},
set: function(key, value) {
this[prefix + key] = value;
return this;
},
remove: function(key) {
var property = prefix + key;
return property in this && delete this[property];
},
clear: function() {
for (var property in this) if (property[0] === prefix) delete this[property];
},
keys: function() {
var keys = [];
for (var property in this) if (property[0] === prefix) keys.push(property.slice(1));
return keys;
},
values: function() {
var values = [];
for (var property in this) if (property[0] === prefix) values.push(this[property]);
return values;
},
entries: function() {
var entries = [];
for (var property in this) if (property[0] === prefix) entries.push({key: property.slice(1), value: this[property]});
return entries;
},
size: function() {
var size = 0;
for (var property in this) if (property[0] === prefix) ++size;
return size;
},
empty: function() {
for (var property in this) if (property[0] === prefix) return false;
return true;
},
each: function(f) {
for (var property in this) if (property[0] === prefix) f(this[property], property.slice(1), this);
}
};
function map$1(object, f) {
var map = new Map;
// Copy constructor.
if (object instanceof Map) object.each(function(value, key) { map.set(key, value); });
// Index array by numeric index or specified key function.
else if (Array.isArray(object)) {
var i = -1,
n = object.length,
o;
if (f == null) while (++i < n) map.set(i, object[i]);
else while (++i < n) map.set(f(o = object[i], i, object), o);
}
// Convert object to map.
else if (object) for (var key in object) map.set(key, object[key]);
return map;
}
var nest = function() {
var keys = [],
sortKeys = [],
sortValues,
rollup,
nest;
function apply(array, depth, createResult, setResult) {
if (depth >= keys.length) return rollup != null
? rollup(array) : (sortValues != null
? array.sort(sortValues)
: array);
var i = -1,
n = array.length,
key = keys[depth++],
keyValue,
value,
valuesByKey = map$1(),
values,
result = createResult();
while (++i < n) {
if (values = valuesByKey.get(keyValue = key(value = array[i]) + "")) {
values.push(value);
} else {
valuesByKey.set(keyValue, [value]);
}
}
valuesByKey.each(function(values, key) {
setResult(result, key, apply(values, depth, createResult, setResult));
});
return result;
}
function entries(map, depth) {
if (++depth > keys.length) return map;
var array, sortKey = sortKeys[depth - 1];
if (rollup != null && depth >= keys.length) array = map.entries();
else array = [], map.each(function(v, k) { array.push({key: k, values: entries(v, depth)}); });
return sortKey != null ? array.sort(function(a, b) { return sortKey(a.key, b.key); }) : array;
}
return nest = {
object: function(array) { return apply(array, 0, createObject, setObject); },
map: function(array) { return apply(array, 0, createMap, setMap); },
entries: function(array) { return entries(apply(array, 0, createMap, setMap), 0); },
key: function(d) { keys.push(d); return nest; },
sortKeys: function(order) { sortKeys[keys.length - 1] = order; return nest; },
sortValues: function(order) { sortValues = order; return nest; },
rollup: function(f) { rollup = f; return nest; }
};
};
function createObject() {
return {};
}
function setObject(object, key, value) {
object[key] = value;
}
function createMap() {
return map$1();
}
function setMap(map, key, value) {
map.set(key, value);
}
function Set() {}
var proto = map$1.prototype;
Set.prototype = set$2.prototype = {
constructor: Set,
has: proto.has,
add: function(value) {
value += "";
this[prefix + value] = value;
return this;
},
remove: proto.remove,
clear: proto.clear,
values: proto.keys,
size: proto.size,
empty: proto.empty,
each: proto.each
};
function set$2(object, f) {
var set = new Set;
// Copy constructor.
if (object instanceof Set) object.each(function(value) { set.add(value); });
// Otherwise, assume it’s an array.
else if (object) {
var i = -1, n = object.length;
if (f == null) while (++i < n) set.add(object[i]);
else while (++i < n) set.add(f(object[i], i, object));
}
return set;
}
var d3keys = function(map) {
var keys = [];
for (var key in map) keys.push(key);
return keys;
};
var values = function(map) {
var values = [];
for (var key in map) values.push(map[key]);
return values;
};
var entries = function(map) {
var entries = [];
for (var key in map) entries.push({key: key, value: map[key]});
return entries;
};
function objectConverter(columns) {
return new Function("d", "return {" + columns.map(function(name, i) {
return JSON.stringify(name) + ": d[" + i + "]";
}).join(",") + "}");
}
function customConverter(columns, f) {
var object = objectConverter(columns);
return function(row, i) {
return f(object(row), i, columns);
};
}
// Compute unique columns in order of discovery.
function inferColumns(rows) {
var columnSet = Object.create(null),
columns = [];
rows.forEach(function(row) {
for (var column in row) {
if (!(column in columnSet)) {
columns.push(columnSet[column] = column);
}
}
});
return columns;
}
var dsv = function(delimiter) {
var reFormat = new RegExp("[\"" + delimiter + "\n\r]"),
delimiterCode = delimiter.charCodeAt(0);
function parse(text, f) {
var convert, columns, rows = parseRows(text, function(row, i) {
if (convert) return convert(row, i - 1);
columns = row, convert = f ? customConverter(row, f) : objectConverter(row);
});
rows.columns = columns;
return rows;
}
function parseRows(text, f) {
var EOL = {}, // sentinel value for end-of-line
EOF = {}, // sentinel value for end-of-file
rows = [], // output rows
N = text.length,
I = 0, // current character index
n = 0, // the current line number
t, // the current token
eol; // is the current token followed by EOL?
function token() {
if (I >= N) return EOF; // special case: end of file
if (eol) return eol = false, EOL; // special case: end of line
// special case: quotes
var j = I, c;
if (text.charCodeAt(j) === 34) {
var i = j;
while (i++ < N) {
if (text.charCodeAt(i) === 34) {
if (text.charCodeAt(i + 1) !== 34) break;
++i;
}
}
I = i + 2;
c = text.charCodeAt(i + 1);
if (c === 13) {
eol = true;
if (text.charCodeAt(i + 2) === 10) ++I;
} else if (c === 10) {
eol = true;
}
return text.slice(j + 1, i).replace(/""/g, "\"");
}
// common case: find next delimiter or newline
while (I < N) {
var k = 1;
c = text.charCodeAt(I++);
if (c === 10) eol = true; // \n
else if (c === 13) { eol = true; if (text.charCodeAt(I) === 10) ++I, ++k; } // \r|\r\n
else if (c !== delimiterCode) continue;
return text.slice(j, I - k);
}
// special case: last token before EOF
return text.slice(j);
}
while ((t = token()) !== EOF) {
var a = [];
while (t !== EOL && t !== EOF) {
a.push(t);
t = token();
}
if (f && (a = f(a, n++)) == null) continue;
rows.push(a);
}
return rows;
}
function format(rows, columns) {
if (columns == null) columns = inferColumns(rows);
return [columns.map(formatValue).join(delimiter)].concat(rows.map(function(row) {
return columns.map(function(column) {
return formatValue(row[column]);
}).join(delimiter);
})).join("\n");
}
function formatRows(rows) {
return rows.map(formatRow).join("\n");
}
function formatRow(row) {
return row.map(formatValue).join(delimiter);
}
function formatValue(text) {
return text == null ? ""
: reFormat.test(text += "") ? "\"" + text.replace(/\"/g, "\"\"") + "\""
: text;
}
return {
parse: parse,
parseRows: parseRows,
format: format,
formatRows: formatRows
};
};
var csv = dsv(",");
var csvParse = csv.parse;
var csvParseRows = csv.parseRows;
var csvFormat = csv.format;
var csvFormatRows = csv.formatRows;
var tsv = dsv("\t");
var tsvParse = tsv.parse;
var tsvParseRows = tsv.parseRows;
var tsvFormat = tsv.format;
var tsvFormatRows = tsv.formatRows;
var center$1 = function(x, y) {
var nodes;
if (x == null) x = 0;
if (y == null) y = 0;
function force() {
var i,
n = nodes.length,
node,
sx = 0,
sy = 0;
for (i = 0; i < n; ++i) {
node = nodes[i], sx += node.x, sy += node.y;
}
for (sx = sx / n - x, sy = sy / n - y, i = 0; i < n; ++i) {
node = nodes[i], node.x -= sx, node.y -= sy;
}
}
force.initialize = function(_) {
nodes = _;
};
force.x = function(_) {
return arguments.length ? (x = +_, force) : x;
};
force.y = function(_) {
return arguments.length ? (y = +_, force) : y;
};
return force;
};
var constant$6 = function(x) {
return function() {
return x;
};
};
var jiggle = function() {
return (Math.random() - 0.5) * 1e-6;
};
var tree_add = function(d) {
var x = +this._x.call(null, d),
y = +this._y.call(null, d);
return add(this.cover(x, y), x, y, d);
};
function add(tree, x, y, d) {
if (isNaN(x) || isNaN(y)) return tree; // ignore invalid points
var parent,
node = tree._root,
leaf = {data: d},
x0 = tree._x0,
y0 = tree._y0,
x1 = tree._x1,
y1 = tree._y1,
xm,
ym,
xp,
yp,
right,
bottom,
i,
j;
// If the tree is empty, initialize the root as a leaf.
if (!node) return tree._root = leaf, tree;
// Find the existing leaf for the new point, or add it.
while (node.length) {
if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;
if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;
if (parent = node, !(node = node[i = bottom << 1 | right])) return parent[i] = leaf, tree;
}
// Is the new point is exactly coincident with the existing point?
xp = +tree._x.call(null, node.data);
yp = +tree._y.call(null, node.data);
if (x === xp && y === yp) return leaf.next = node, parent ? parent[i] = leaf : tree._root = leaf, tree;
// Otherwise, split the leaf node until the old and new point are separated.
do {
parent = parent ? parent[i] = new Array(4) : tree._root = new Array(4);
if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;
if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;
} while ((i = bottom << 1 | right) === (j = (yp >= ym) << 1 | (xp >= xm)));
return parent[j] = node, parent[i] = leaf, tree;
}
function addAll(data) {
var d, i, n = data.length,
x,
y,
xz = new Array(n),
yz = new Array(n),
x0 = Infinity,
y0 = Infinity,
x1 = -Infinity,
y1 = -Infinity;
// Compute the points and their extent.
for (i = 0; i < n; ++i) {
if (isNaN(x = +this._x.call(null, d = data[i])) || isNaN(y = +this._y.call(null, d))) continue;
xz[i] = x;
yz[i] = y;
if (x < x0) x0 = x;
if (x > x1) x1 = x;
if (y < y0) y0 = y;
if (y > y1) y1 = y;
}
// If there were no (valid) points, inherit the existing extent.
if (x1 < x0) x0 = this._x0, x1 = this._x1;
if (y1 < y0) y0 = this._y0, y1 = this._y1;
// Expand the tree to cover the new points.
this.cover(x0, y0).cover(x1, y1);
// Add the new points.
for (i = 0; i < n; ++i) {
add(this, xz[i], yz[i], data[i]);
}
return this;
}
var tree_cover = function(x, y) {
if (isNaN(x = +x) || isNaN(y = +y)) return this; // ignore invalid points
var x0 = this._x0,
y0 = this._y0,
x1 = this._x1,
y1 = this._y1;
// If the quadtree has no extent, initialize them.
// Integer extent are necessary so that if we later double the extent,
// the existing quadrant boundaries don’t change due to floating point error!
if (isNaN(x0)) {
x1 = (x0 = Math.floor(x)) + 1;
y1 = (y0 = Math.floor(y)) + 1;
}
// Otherwise, double repeatedly to cover.
else if (x0 > x || x > x1 || y0 > y || y > y1) {
var z = x1 - x0,
node = this._root,
parent,
i;
switch (i = (y < (y0 + y1) / 2) << 1 | (x < (x0 + x1) / 2)) {
case 0: {
do parent = new Array(4), parent[i] = node, node = parent;
while (z *= 2, x1 = x0 + z, y1 = y0 + z, x > x1 || y > y1);
break;
}
case 1: {
do parent = new Array(4), parent[i] = node, node = parent;
while (z *= 2, x0 = x1 - z, y1 = y0 + z, x0 > x || y > y1);
break;
}
case 2: {
do parent = new Array(4), parent[i] = node, node = parent;
while (z *= 2, x1 = x0 + z, y0 = y1 - z, x > x1 || y0 > y);
break;
}
case 3: {
do parent = new Array(4), parent[i] = node, node = parent;
while (z *= 2, x0 = x1 - z, y0 = y1 - z, x0 > x || y0 > y);
break;
}
}
if (this._root && this._root.length) this._root = node;
}
// If the quadtree covers the point already, just return.
else return this;
this._x0 = x0;
this._y0 = y0;
this._x1 = x1;
this._y1 = y1;
return this;
};
var tree_data = function() {
var data = [];
this.visit(function(node) {
if (!node.length) do data.push(node.data); while (node = node.next)
});
return data;
};
var tree_extent = function(_) {
return arguments.length
? this.cover(+_[0][0], +_[0][1]).cover(+_[1][0], +_[1][1])
: isNaN(this._x0) ? undefined : [[this._x0, this._y0], [this._x1, this._y1]];
};
var Quad = function(node, x0, y0, x1, y1) {
this.node = node;
this.x0 = x0;
this.y0 = y0;
this.x1 = x1;
this.y1 = y1;
};
var tree_find = function(x, y, radius) {
var data,
x0 = this._x0,
y0 = this._y0,
x1,
y1,
x2,
y2,
x3 = this._x1,
y3 = this._y1,
quads = [],
node = this._root,
q,
i;
if (node) quads.push(new Quad(node, x0, y0, x3, y3));
if (radius == null) radius = Infinity;
else {
x0 = x - radius, y0 = y - radius;
x3 = x + radius, y3 = y + radius;
radius *= radius;
}
while (q = quads.pop()) {
// Stop searching if this quadrant can’t contain a closer node.
if (!(node = q.node)
|| (x1 = q.x0) > x3
|| (y1 = q.y0) > y3
|| (x2 = q.x1) < x0
|| (y2 = q.y1) < y0) continue;
// Bisect the current quadrant.
if (node.length) {
var xm = (x1 + x2) / 2,
ym = (y1 + y2) / 2;
quads.push(
new Quad(node[3], xm, ym, x2, y2),
new Quad(node[2], x1, ym, xm, y2),
new Quad(node[1], xm, y1, x2, ym),
new Quad(node[0], x1, y1, xm, ym)
);
// Visit the closest quadrant first.
if (i = (y >= ym) << 1 | (x >= xm)) {
q = quads[quads.length - 1];
quads[quads.length - 1] = quads[quads.length - 1 - i];
quads[quads.length - 1 - i] = q;
}
}
// Visit this point. (Visiting coincident points isn’t necessary!)
else {
var dx = x - +this._x.call(null, node.data),
dy = y - +this._y.call(null, node.data),
d2 = dx * dx + dy * dy;
if (d2 < radius) {
var d = Math.sqrt(radius = d2);
x0 = x - d, y0 = y - d;
x3 = x + d, y3 = y + d;
data = node.data;
}
}
}
return data;
};
var tree_remove = function(d) {
if (isNaN(x = +this._x.call(null, d)) || isNaN(y = +this._y.call(null, d))) return this; // ignore invalid points
var parent,
node = this._root,
retainer,
previous,
next,
x0 = this._x0,
y0 = this._y0,
x1 = this._x1,
y1 = this._y1,
x,
y,
xm,
ym,
right,
bottom,
i,
j;
// If the tree is empty, initialize the root as a leaf.
if (!node) return this;
// Find the leaf node for the point.
// While descending, also retain the deepest parent with a non-removed sibling.
if (node.length) while (true) {
if (right = x >= (xm = (x0 + x1) / 2)) x0 = xm; else x1 = xm;
if (bottom = y >= (ym = (y0 + y1) / 2)) y0 = ym; else y1 = ym;
if (!(parent = node, node = node[i = bottom << 1 | right])) return this;
if (!node.length) break;
if (parent[(i + 1) & 3] || parent[(i + 2) & 3] || parent[(i + 3) & 3]) retainer = parent, j = i;
}
// Find the point to remove.
while (node.data !== d) if (!(previous = node, node = node.next)) return this;
if (next = node.next) delete node.next;
// If there are multiple coincident points, remove just the point.
if (previous) return (next ? previous.next = next : delete previous.next), this;
// If this is the root point, remove it.
if (!parent) return this._root = next, this;
// Remove this leaf.
next ? parent[i] = next : delete parent[i];
// If the parent now contains exactly one leaf, collapse superfluous parents.
if ((node = parent[0] || parent[1] || parent[2] || parent[3])
&& node === (parent[3] || parent[2] || parent[1] || parent[0])
&& !node.length) {
if (retainer) retainer[j] = node;
else this._root = node;
}
return this;
};
function removeAll(data) {
for (var i = 0, n = data.length; i < n; ++i) this.remove(data[i]);
return this;
}
var tree_root = function() {
return this._root;
};
var tree_size = function() {
var size = 0;
this.visit(function(node) {
if (!node.length) do ++size; while (node = node.next)
});
return size;
};
var tree_visit = function(callback) {
var quads = [], q, node = this._root, child, x0, y0, x1, y1;
if (node) quads.push(new Quad(node, this._x0, this._y0, this._x1, this._y1));
while (q = quads.pop()) {
if (!callback(node = q.node, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1) && node.length) {
var xm = (x0 + x1) / 2, ym = (y0 + y1) / 2;
if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1));
if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1));
if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym));
if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym));
}
}
return this;
};
var tree_visitAfter = function(callback) {
var quads = [], next = [], q;
if (this._root) quads.push(new Quad(this._root, this._x0, this._y0, this._x1, this._y1));
while (q = quads.pop()) {
var node = q.node;
if (node.length) {
var child, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1, xm = (x0 + x1) / 2, ym = (y0 + y1) / 2;
if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym));
if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym));
if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1));
if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1));
}
next.push(q);
}
while (q = next.pop()) {
callback(q.node, q.x0, q.y0, q.x1, q.y1);
}
return this;
};
function defaultX(d) {
return d[0];
}
var tree_x = function(_) {
return arguments.length ? (this._x = _, this) : this._x;
};
function defaultY(d) {
return d[1];
}
var tree_y = function(_) {
return arguments.length ? (this._y = _, this) : this._y;
};
function quadtree(nodes, x, y) {
var tree = new Quadtree(x == null ? defaultX : x, y == null ? defaultY : y, NaN, NaN, NaN, NaN);
return nodes == null ? tree : tree.addAll(nodes);
}
function Quadtree(x, y, x0, y0, x1, y1) {
this._x = x;
this._y = y;
this._x0 = x0;
this._y0 = y0;
this._x1 = x1;
this._y1 = y1;
this._root = undefined;
}
function leaf_copy(leaf) {
var copy = {data: leaf.data}, next = copy;
while (leaf = leaf.next) next = next.next = {data: leaf.data};
return copy;
}
var treeProto = quadtree.prototype = Quadtree.prototype;
treeProto.copy = function() {
var copy = new Quadtree(this._x, this._y, this._x0, this._y0, this._x1, this._y1),
node = this._root,
nodes,
child;
if (!node) return copy;
if (!node.length) return copy._root = leaf_copy(node), copy;
nodes = [{source: node, target: copy._root = new Array(4)}];
while (node = nodes.pop()) {
for (var i = 0; i < 4; ++i) {
if (child = node.source[i]) {
if (child.length) nodes.push({source: child, target: node.target[i] = new Array(4)});
else node.target[i] = leaf_copy(child);
}
}
}
return copy;
};
treeProto.add = tree_add;
treeProto.addAll = addAll;
treeProto.cover = tree_cover;
treeProto.data = tree_data;
treeProto.extent = tree_extent;
treeProto.find = tree_find;
treeProto.remove = tree_remove;
treeProto.removeAll = removeAll;
treeProto.root = tree_root;
treeProto.size = tree_size;
treeProto.visit = tree_visit;
treeProto.visitAfter = tree_visitAfter;
treeProto.x = tree_x;
treeProto.y = tree_y;
function x(d) {
return d.x + d.vx;
}
function y(d) {
return d.y + d.vy;
}
var collide = function(radius) {
var nodes,
radii,
strength = 1,
iterations = 1;
if (typeof radius !== "function") radius = constant$6(radius == null ? 1 : +radius);
function force() {
var i, n = nodes.length,
tree,
node,
xi,
yi,
ri,
ri2;
for (var k = 0; k < iterations; ++k) {
tree = quadtree(nodes, x, y).visitAfter(prepare);
for (i = 0; i < n; ++i) {
node = nodes[i];
ri = radii[node.index], ri2 = ri * ri;
xi = node.x + node.vx;
yi = node.y + node.vy;
tree.visit(apply);
}
}
function apply(quad, x0, y0, x1, y1) {
var data = quad.data, rj = quad.r, r = ri + rj;
if (data) {
if (data.index > node.index) {
var x = xi - data.x - data.vx,
y = yi - data.y - data.vy,
l = x * x + y * y;
if (l < r * r) {
if (x === 0) x = jiggle(), l += x * x;
if (y === 0) y = jiggle(), l += y * y;
l = (r - (l = Math.sqrt(l))) / l * strength;
node.vx += (x *= l) * (r = (rj *= rj) / (ri2 + rj));
node.vy += (y *= l) * r;
data.vx -= x * (r = 1 - r);
data.vy -= y * r;
}
}
return;
}
return x0 > xi + r || x1 < xi - r || y0 > yi + r || y1 < yi - r;
}
}
function prepare(quad) {
if (quad.data) return quad.r = radii[quad.data.index];
for (var i = quad.r = 0; i < 4; ++i) {
if (quad[i] && quad[i].r > quad.r) {
quad.r = quad[i].r;
}
}
}
function initialize() {
if (!nodes) return;
var i, n = nodes.length, node;
radii = new Array(n);
for (i = 0; i < n; ++i) node = nodes[i], radii[node.index] = +radius(node, i, nodes);
}
force.initialize = function(_) {
nodes = _;
initialize();
};
force.iterations = function(_) {
return arguments.length ? (iterations = +_, force) : iterations;
};
force.strength = function(_) {
return arguments.length ? (strength = +_, force) : strength;
};
force.radius = function(_) {
return arguments.length ? (radius = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : radius;
};
return force;
};
function index(d) {
return d.index;
}
function find(nodeById, nodeId) {
var node = nodeById.get(nodeId);
if (!node) throw new Error("missing: " + nodeId);
return node;
}
var link = function(links) {
var id = index,
strength = defaultStrength,
strengths,
distance = constant$6(30),
distances,
nodes,
count,
bias,
iterations = 1;
if (links == null) links = [];
function defaultStrength(link) {
return 1 / Math.min(count[link.source.index], count[link.target.index]);
}
function force(alpha) {
for (var k = 0, n = links.length; k < iterations; ++k) {
for (var i = 0, link, source, target, x, y, l, b; i < n; ++i) {
link = links[i], source = link.source, target = link.target;
x = target.x + target.vx - source.x - source.vx || jiggle();
y = target.y + target.vy - source.y - source.vy || jiggle();
l = Math.sqrt(x * x + y * y);
l = (l - distances[i]) / l * alpha * strengths[i];
x *= l, y *= l;
target.vx -= x * (b = bias[i]);
target.vy -= y * b;
source.vx += x * (b = 1 - b);
source.vy += y * b;
}
}
}
function initialize() {
if (!nodes) return;
var i,
n = nodes.length,
m = links.length,
nodeById = map$1(nodes, id),
link;
for (i = 0, count = new Array(n); i < m; ++i) {
link = links[i], link.index = i;
if (typeof link.source !== "object") link.source = find(nodeById, link.source);
if (typeof link.target !== "object") link.target = find(nodeById, link.target);
count[link.source.index] = (count[link.source.index] || 0) + 1;
count[link.target.index] = (count[link.target.index] || 0) + 1;
}
for (i = 0, bias = new Array(m); i < m; ++i) {
link = links[i], bias[i] = count[link.source.index] / (count[link.source.index] + count[link.target.index]);
}
strengths = new Array(m), initializeStrength();
distances = new Array(m), initializeDistance();
}
function initializeStrength() {
if (!nodes) return;
for (var i = 0, n = links.length; i < n; ++i) {
strengths[i] = +strength(links[i], i, links);
}
}
function initializeDistance() {
if (!nodes) return;
for (var i = 0, n = links.length; i < n; ++i) {
distances[i] = +distance(links[i], i, links);
}
}
force.initialize = function(_) {
nodes = _;
initialize();
};
force.links = function(_) {
return arguments.length ? (links = _, initialize(), force) : links;
};
force.id = function(_) {
return arguments.length ? (id = _, force) : id;
};
force.iterations = function(_) {
return arguments.length ? (iterations = +_, force) : iterations;
};
force.strength = function(_) {
return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initializeStrength(), force) : strength;
};
force.distance = function(_) {
return arguments.length ? (distance = typeof _ === "function" ? _ : constant$6(+_), initializeDistance(), force) : distance;
};
return force;
};
function x$1(d) {
return d.x;
}
function y$1(d) {
return d.y;
}
var initialRadius = 10;
var initialAngle = Math.PI * (3 - Math.sqrt(5));
var simulation = function(nodes) {
var simulation,
alpha = 1,
alphaMin = 0.001,
alphaDecay = 1 - Math.pow(alphaMin, 1 / 300),
alphaTarget = 0,
velocityDecay = 0.6,
forces = map$1(),
stepper = timer(step),
event = dispatch("tick", "end");
if (nodes == null) nodes = [];
function step() {
tick();
event.call("tick", simulation);
if (alpha < alphaMin) {
stepper.stop();
event.call("end", simulation);
}
}
function tick() {
var i, n = nodes.length, node;
alpha += (alphaTarget - alpha) * alphaDecay;
forces.each(function(force) {
force(alpha);
});
for (i = 0; i < n; ++i) {
node = nodes[i];
if (node.fx == null) node.x += node.vx *= velocityDecay;
else node.x = node.fx, node.vx = 0;
if (node.fy == null) node.y += node.vy *= velocityDecay;
else node.y = node.fy, node.vy = 0;
}
}
function initializeNodes() {
for (var i = 0, n = nodes.length, node; i < n; ++i) {
node = nodes[i], node.index = i;
if (isNaN(node.x) || isNaN(node.y)) {
var radius = initialRadius * Math.sqrt(i), angle = i * initialAngle;
node.x = radius * Math.cos(angle);
node.y = radius * Math.sin(angle);
}
if (isNaN(node.vx) || isNaN(node.vy)) {
node.vx = node.vy = 0;
}
}
}
function initializeForce(force) {
if (force.initialize) force.initialize(nodes);
return force;
}
initializeNodes();
return simulation = {
tick: tick,
restart: function() {
return stepper.restart(step), simulation;
},
stop: function() {
return stepper.stop(), simulation;
},
nodes: function(_) {
return arguments.length ? (nodes = _, initializeNodes(), forces.each(initializeForce), simulation) : nodes;
},
alpha: function(_) {
return arguments.length ? (alpha = +_, simulation) : alpha;
},
alphaMin: function(_) {
return arguments.length ? (alphaMin = +_, simulation) : alphaMin;
},
alphaDecay: function(_) {
return arguments.length ? (alphaDecay = +_, simulation) : +alphaDecay;
},
alphaTarget: function(_) {
return arguments.length ? (alphaTarget = +_, simulation) : alphaTarget;
},
velocityDecay: function(_) {
return arguments.length ? (velocityDecay = 1 - _, simulation) : 1 - velocityDecay;
},
force: function(name, _) {
return arguments.length > 1 ? ((_ == null ? forces.remove(name) : forces.set(name, initializeForce(_))), simulation) : forces.get(name);
},
find: function(x, y, radius) {
var i = 0,
n = nodes.length,
dx,
dy,
d2,
node,
closest;
if (radius == null) radius = Infinity;
else radius *= radius;
for (i = 0; i < n; ++i) {
node = nodes[i];
dx = x - node.x;
dy = y - node.y;
d2 = dx * dx + dy * dy;
if (d2 < radius) closest = node, radius = d2;
}
return closest;
},
on: function(name, _) {
return arguments.length > 1 ? (event.on(name, _), simulation) : event.on(name);
}
};
};
var manyBody = function() {
var nodes,
node,
alpha,
strength = constant$6(-30),
strengths,
distanceMin2 = 1,
distanceMax2 = Infinity,
theta2 = 0.81;
function force(_) {
var i, n = nodes.length, tree = quadtree(nodes, x$1, y$1).visitAfter(accumulate);
for (alpha = _, i = 0; i < n; ++i) node = nodes[i], tree.visit(apply);
}
function initialize() {
if (!nodes) return;
var i, n = nodes.length, node;
strengths = new Array(n);
for (i = 0; i < n; ++i) node = nodes[i], strengths[node.index] = +strength(node, i, nodes);
}
function accumulate(quad) {
var strength = 0, q, c, x$$1, y$$1, i;
// For internal nodes, accumulate forces from child quadrants.
if (quad.length) {
for (x$$1 = y$$1 = i = 0; i < 4; ++i) {
if ((q = quad[i]) && (c = q.value)) {
strength += c, x$$1 += c * q.x, y$$1 += c * q.y;
}
}
quad.x = x$$1 / strength;
quad.y = y$$1 / strength;
}
// For leaf nodes, accumulate forces from coincident quadrants.
else {
q = quad;
q.x = q.data.x;
q.y = q.data.y;
do strength += strengths[q.data.index];
while (q = q.next);
}
quad.value = strength;
}
function apply(quad, x1, _, x2) {
if (!quad.value) return true;
var x$$1 = quad.x - node.x,
y$$1 = quad.y - node.y,
w = x2 - x1,
l = x$$1 * x$$1 + y$$1 * y$$1;
// Apply the Barnes-Hut approximation if possible.
// Limit forces for very close nodes; randomize direction if coincident.
if (w * w / theta2 < l) {
if (l < distanceMax2) {
if (x$$1 === 0) x$$1 = jiggle(), l += x$$1 * x$$1;
if (y$$1 === 0) y$$1 = jiggle(), l += y$$1 * y$$1;
if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l);
node.vx += x$$1 * quad.value * alpha / l;
node.vy += y$$1 * quad.value * alpha / l;
}
return true;
}
// Otherwise, process points directly.
else if (quad.length || l >= distanceMax2) return;
// Limit forces for very close nodes; randomize direction if coincident.
if (quad.data !== node || quad.next) {
if (x$$1 === 0) x$$1 = jiggle(), l += x$$1 * x$$1;
if (y$$1 === 0) y$$1 = jiggle(), l += y$$1 * y$$1;
if (l < distanceMin2) l = Math.sqrt(distanceMin2 * l);
}
do if (quad.data !== node) {
w = strengths[quad.data.index] * alpha / l;
node.vx += x$$1 * w;
node.vy += y$$1 * w;
} while (quad = quad.next);
}
force.initialize = function(_) {
nodes = _;
initialize();
};
force.strength = function(_) {
return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : strength;
};
force.distanceMin = function(_) {
return arguments.length ? (distanceMin2 = _ * _, force) : Math.sqrt(distanceMin2);
};
force.distanceMax = function(_) {
return arguments.length ? (distanceMax2 = _ * _, force) : Math.sqrt(distanceMax2);
};
force.theta = function(_) {
return arguments.length ? (theta2 = _ * _, force) : Math.sqrt(theta2);
};
return force;
};
var x$2 = function(x) {
var strength = constant$6(0.1),
nodes,
strengths,
xz;
if (typeof x !== "function") x = constant$6(x == null ? 0 : +x);
function force(alpha) {
for (var i = 0, n = nodes.length, node; i < n; ++i) {
node = nodes[i], node.vx += (xz[i] - node.x) * strengths[i] * alpha;
}
}
function initialize() {
if (!nodes) return;
var i, n = nodes.length;
strengths = new Array(n);
xz = new Array(n);
for (i = 0; i < n; ++i) {
strengths[i] = isNaN(xz[i] = +x(nodes[i], i, nodes)) ? 0 : +strength(nodes[i], i, nodes);
}
}
force.initialize = function(_) {
nodes = _;
initialize();
};
force.strength = function(_) {
return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : strength;
};
force.x = function(_) {
return arguments.length ? (x = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : x;
};
return force;
};
var y$2 = function(y) {
var strength = constant$6(0.1),
nodes,
strengths,
yz;
if (typeof y !== "function") y = constant$6(y == null ? 0 : +y);
function force(alpha) {
for (var i = 0, n = nodes.length, node; i < n; ++i) {
node = nodes[i], node.vy += (yz[i] - node.y) * strengths[i] * alpha;
}
}
function initialize() {
if (!nodes) return;
var i, n = nodes.length;
strengths = new Array(n);
yz = new Array(n);
for (i = 0; i < n; ++i) {
strengths[i] = isNaN(yz[i] = +y(nodes[i], i, nodes)) ? 0 : +strength(nodes[i], i, nodes);
}
}
force.initialize = function(_) {
nodes = _;
initialize();
};
force.strength = function(_) {
return arguments.length ? (strength = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : strength;
};
force.y = function(_) {
return arguments.length ? (y = typeof _ === "function" ? _ : constant$6(+_), initialize(), force) : y;
};
return force;
};
// Computes the decimal coefficient and exponent of the specified number x with
// significant digits p, where x is positive and p is in [1, 21] or undefined.
// For example, formatDecimal(1.23) returns ["123", 0].
var formatDecimal = function(x, p) {
if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) return null; // NaN, ±Infinity
var i, coefficient = x.slice(0, i);
// The string returned by toExponential either has the form \d\.\d+e[-+]\d+
// (e.g., 1.2e+3) or the form \de[-+]\d+ (e.g., 1e+3).
return [
coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient,
+x.slice(i + 1)
];
};
var exponent$1 = function(x) {
return x = formatDecimal(Math.abs(x)), x ? x[1] : NaN;
};
var formatGroup = function(grouping, thousands) {
return function(value, width) {
var i = value.length,
t = [],
j = 0,
g = grouping[0],
length = 0;
while (i > 0 && g > 0) {
if (length + g + 1 > width) g = Math.max(1, width - length);
t.push(value.substring(i -= g, i + g));
if ((length += g + 1) > width) break;
g = grouping[j = (j + 1) % grouping.length];
}
return t.reverse().join(thousands);
};
};
var formatNumerals = function(numerals) {
return function(value) {
return value.replace(/[0-9]/g, function(i) {
return numerals[+i];
});
};
};
var formatDefault = function(x, p) {
x = x.toPrecision(p);
out: for (var n = x.length, i = 1, i0 = -1, i1; i < n; ++i) {
switch (x[i]) {
case ".": i0 = i1 = i; break;
case "0": if (i0 === 0) i0 = i; i1 = i; break;
case "e": break out;
default: if (i0 > 0) i0 = 0; break;
}
}
return i0 > 0 ? x.slice(0, i0) + x.slice(i1 + 1) : x;
};
var prefixExponent;
var formatPrefixAuto = function(x, p) {
var d = formatDecimal(x, p);
if (!d) return x + "";
var coefficient = d[0],
exponent = d[1],
i = exponent - (prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1,
n = coefficient.length;
return i === n ? coefficient
: i > n ? coefficient + new Array(i - n + 1).join("0")
: i > 0 ? coefficient.slice(0, i) + "." + coefficient.slice(i)
: "0." + new Array(1 - i).join("0") + formatDecimal(x, Math.max(0, p + i - 1))[0]; // less than 1y!
};
var formatRounded = function(x, p) {
var d = formatDecimal(x, p);
if (!d) return x + "";
var coefficient = d[0],
exponent = d[1];
return exponent < 0 ? "0." + new Array(-exponent).join("0") + coefficient
: coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + "." + coefficient.slice(exponent + 1)
: coefficient + new Array(exponent - coefficient.length + 2).join("0");
};
var formatTypes = {
"": formatDefault,
"%": function(x, p) { return (x * 100).toFixed(p); },
"b": function(x) { return Math.round(x).toString(2); },
"c": function(x) { return x + ""; },
"d": function(x) { return Math.round(x).toString(10); },
"e": function(x, p) { return x.toExponential(p); },
"f": function(x, p) { return x.toFixed(p); },
"g": function(x, p) { return x.toPrecision(p); },
"o": function(x) { return Math.round(x).toString(8); },
"p": function(x, p) { return formatRounded(x * 100, p); },
"r": formatRounded,
"s": formatPrefixAuto,
"X": function(x) { return Math.round(x).toString(16).toUpperCase(); },
"x": function(x) { return Math.round(x).toString(16); }
};
// [[fill]align][sign][symbol][0][width][,][.precision][type]
var re = /^(?:(.)?([<>=^]))?([+\-\( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?([a-z%])?$/i;
function formatSpecifier(specifier) {
return new FormatSpecifier(specifier);
}
formatSpecifier.prototype = FormatSpecifier.prototype; // instanceof
function FormatSpecifier(specifier) {
if (!(match = re.exec(specifier))) throw new Error("invalid format: " + specifier);
var match,
fill = match[1] || " ",
align = match[2] || ">",
sign = match[3] || "-",
symbol = match[4] || "",
zero = !!match[5],
width = match[6] && +match[6],
comma = !!match[7],
precision = match[8] && +match[8].slice(1),
type = match[9] || "";
// The "n" type is an alias for ",g".
if (type === "n") comma = true, type = "g";
// Map invalid types to the default format.
else if (!formatTypes[type]) type = "";
// If zero fill is specified, padding goes after sign and before digits.
if (zero || (fill === "0" && align === "=")) zero = true, fill = "0", align = "=";
this.fill = fill;
this.align = align;
this.sign = sign;
this.symbol = symbol;
this.zero = zero;
this.width = width;
this.comma = comma;
this.precision = precision;
this.type = type;
}
FormatSpecifier.prototype.toString = function() {
return this.fill
+ this.align
+ this.sign
+ this.symbol
+ (this.zero ? "0" : "")
+ (this.width == null ? "" : Math.max(1, this.width | 0))
+ (this.comma ? "," : "")
+ (this.precision == null ? "" : "." + Math.max(0, this.precision | 0))
+ this.type;
};
var identity$3 = function(x) {
return x;
};
var prefixes = ["y","z","a","f","p","n","µ","m","","k","M","G","T","P","E","Z","Y"];
var formatLocale = function(locale) {
var group = locale.grouping && locale.thousands ? formatGroup(locale.grouping, locale.thousands) : identity$3,
currency = locale.currency,
decimal = locale.decimal,
numerals = locale.numerals ? formatNumerals(locale.numerals) : identity$3,
percent = locale.percent || "%";
function newFormat(specifier) {
specifier = formatSpecifier(specifier);
var fill = specifier.fill,
align = specifier.align,
sign = specifier.sign,
symbol = specifier.symbol,
zero = specifier.zero,
width = specifier.width,
comma = specifier.comma,
precision = specifier.precision,
type = specifier.type;
// Compute the prefix and suffix.
// For SI-prefix, the suffix is lazily computed.
var prefix = symbol === "$" ? currency[0] : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "",
suffix = symbol === "$" ? currency[1] : /[%p]/.test(type) ? percent : "";
// What format function should we use?
// Is this an integer type?
// Can this type generate exponential notation?
var formatType = formatTypes[type],
maybeSuffix = !type || /[defgprs%]/.test(type);
// Set the default precision if not specified,
// or clamp the specified precision to the supported range.
// For significant precision, it must be in [1, 21].
// For fixed precision, it must be in [0, 20].
precision = precision == null ? (type ? 6 : 12)
: /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision))
: Math.max(0, Math.min(20, precision));
function format(value) {
var valuePrefix = prefix,
valueSuffix = suffix,
i, n, c;
if (type === "c") {
valueSuffix = formatType(value) + valueSuffix;
value = "";
} else {
value = +value;
// Perform the initial formatting.
var valueNegative = value < 0;
value = formatType(Math.abs(value), precision);
// If a negative value rounds to zero during formatting, treat as positive.
if (valueNegative && +value === 0) valueNegative = false;
// Compute the prefix and suffix.
valuePrefix = (valueNegative ? (sign === "(" ? sign : "-") : sign === "-" || sign === "(" ? "" : sign) + valuePrefix;
valueSuffix = valueSuffix + (type === "s" ? prefixes[8 + prefixExponent / 3] : "") + (valueNegative && sign === "(" ? ")" : "");
// Break the formatted value into the integer “value” part that can be
// grouped, and fractional or exponential “suffix” part that is not.
if (maybeSuffix) {
i = -1, n = value.length;
while (++i < n) {
if (c = value.charCodeAt(i), 48 > c || c > 57) {
valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;
value = value.slice(0, i);
break;
}
}
}
}
// If the fill character is not "0", grouping is applied before padding.
if (comma && !zero) value = group(value, Infinity);
// Compute the padding.
var length = valuePrefix.length + value.length + valueSuffix.length,
padding = length < width ? new Array(width - length + 1).join(fill) : "";
// If the fill character is "0", grouping is applied after padding.
if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = "";
// Reconstruct the final output based on the desired alignment.
switch (align) {
case "<": value = valuePrefix + value + valueSuffix + padding; break;
case "=": value = valuePrefix + padding + value + valueSuffix; break;
case "^": value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length); break;
default: value = padding + valuePrefix + value + valueSuffix; break;
}
return numerals(value);
}
format.toString = function() {
return specifier + "";
};
return format;
}
function formatPrefix(specifier, value) {
var f = newFormat((specifier = formatSpecifier(specifier), specifier.type = "f", specifier)),
e = Math.max(-8, Math.min(8, Math.floor(exponent$1(value) / 3))) * 3,
k = Math.pow(10, -e),
prefix = prefixes[8 + e / 3];
return function(value) {
return f(k * value) + prefix;
};
}
return {
format: newFormat,
formatPrefix: formatPrefix
};
};
var locale$1;
defaultLocale({
decimal: ".",
thousands: ",",
grouping: [3],
currency: ["$", ""]
});
function defaultLocale(definition) {
locale$1 = formatLocale(definition);
exports.format = locale$1.format;
exports.formatPrefix = locale$1.formatPrefix;
return locale$1;
}
var precisionFixed = function(step) {
return Math.max(0, -exponent$1(Math.abs(step)));
};
var precisionPrefix = function(step, value) {
return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent$1(value) / 3))) * 3 - exponent$1(Math.abs(step)));
};
var precisionRound = function(step, max) {
step = Math.abs(step), max = Math.abs(max) - step;
return Math.max(0, exponent$1(max) - exponent$1(step)) + 1;
};
// Adds floating point numbers with twice the normal precision.
// Reference: J. R. Shewchuk, Adaptive Precision Floating-Point Arithmetic and
// Fast Robust Geometric Predicates, Discrete & Computational Geometry 18(3)
// 305–363 (1997).
// Code adapted from GeographicLib by Charles F. F. Karney,
// http://geographiclib.sourceforge.net/
var adder = function() {
return new Adder;
};
function Adder() {
this.reset();
}
Adder.prototype = {
constructor: Adder,
reset: function() {
this.s = // rounded value
this.t = 0; // exact error
},
add: function(y) {
add$1(temp, y, this.t);
add$1(this, temp.s, this.s);
if (this.s) this.t += temp.t;
else this.s = temp.t;
},
valueOf: function() {
return this.s;
}
};
var temp = new Adder;
function add$1(adder, a, b) {
var x = adder.s = a + b,
bv = x - a,
av = x - bv;
adder.t = (a - av) + (b - bv);
}
var epsilon$2 = 1e-6;
var epsilon2$1 = 1e-12;
var pi$3 = Math.PI;
var halfPi$2 = pi$3 / 2;
var quarterPi = pi$3 / 4;
var tau$3 = pi$3 * 2;
var degrees$1 = 180 / pi$3;
var radians = pi$3 / 180;
var abs = Math.abs;
var atan = Math.atan;
var atan2 = Math.atan2;
var cos$1 = Math.cos;
var ceil = Math.ceil;
var exp = Math.exp;
var log = Math.log;
var pow = Math.pow;
var sin$1 = Math.sin;
var sign = Math.sign || function(x) { return x > 0 ? 1 : x < 0 ? -1 : 0; };
var sqrt = Math.sqrt;
var tan = Math.tan;
function acos(x) {
return x > 1 ? 0 : x < -1 ? pi$3 : Math.acos(x);
}
function asin(x) {
return x > 1 ? halfPi$2 : x < -1 ? -halfPi$2 : Math.asin(x);
}
function haversin(x) {
return (x = sin$1(x / 2)) * x;
}
function noop$1() {}
function streamGeometry(geometry, stream) {
if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) {
streamGeometryType[geometry.type](geometry, stream);
}
}
var streamObjectType = {
Feature: function(object, stream) {
streamGeometry(object.geometry, stream);
},
FeatureCollection: function(object, stream) {
var features = object.features, i = -1, n = features.length;
while (++i < n) streamGeometry(features[i].geometry, stream);
}
};
var streamGeometryType = {
Sphere: function(object, stream) {
stream.sphere();
},
Point: function(object, stream) {
object = object.coordinates;
stream.point(object[0], object[1], object[2]);
},
MultiPoint: function(object, stream) {
var coordinates = object.coordinates, i = -1, n = coordinates.length;
while (++i < n) object = coordinates[i], stream.point(object[0], object[1], object[2]);
},
LineString: function(object, stream) {
streamLine(object.coordinates, stream, 0);
},
MultiLineString: function(object, stream) {
var coordinates = object.coordinates, i = -1, n = coordinates.length;
while (++i < n) streamLine(coordinates[i], stream, 0);
},
Polygon: function(object, stream) {
streamPolygon(object.coordinates, stream);
},
MultiPolygon: function(object, stream) {
var coordinates = object.coordinates, i = -1, n = coordinates.length;
while (++i < n) streamPolygon(coordinates[i], stream);
},
GeometryCollection: function(object, stream) {
var geometries = object.geometries, i = -1, n = geometries.length;
while (++i < n) streamGeometry(geometries[i], stream);
}
};
function streamLine(coordinates, stream, closed) {
var i = -1, n = coordinates.length - closed, coordinate;
stream.lineStart();
while (++i < n) coordinate = coordinates[i], stream.point(coordinate[0], coordinate[1], coordinate[2]);
stream.lineEnd();
}
function streamPolygon(coordinates, stream) {
var i = -1, n = coordinates.length;
stream.polygonStart();
while (++i < n) streamLine(coordinates[i], stream, 1);
stream.polygonEnd();
}
var geoStream = function(object, stream) {
if (object && streamObjectType.hasOwnProperty(object.type)) {
streamObjectType[object.type](object, stream);
} else {
streamGeometry(object, stream);
}
};
var areaRingSum = adder();
var areaSum = adder();
var lambda00;
var phi00;
var lambda0;
var cosPhi0;
var sinPhi0;
var areaStream = {
point: noop$1,
lineStart: noop$1,
lineEnd: noop$1,
polygonStart: function() {
areaRingSum.reset();
areaStream.lineStart = areaRingStart;
areaStream.lineEnd = areaRingEnd;
},
polygonEnd: function() {
var areaRing = +areaRingSum;
areaSum.add(areaRing < 0 ? tau$3 + areaRing : areaRing);
this.lineStart = this.lineEnd = this.point = noop$1;
},
sphere: function() {
areaSum.add(tau$3);
}
};
function areaRingStart() {
areaStream.point = areaPointFirst;
}
function areaRingEnd() {
areaPoint(lambda00, phi00);
}
function areaPointFirst(lambda, phi) {
areaStream.point = areaPoint;
lambda00 = lambda, phi00 = phi;
lambda *= radians, phi *= radians;
lambda0 = lambda, cosPhi0 = cos$1(phi = phi / 2 + quarterPi), sinPhi0 = sin$1(phi);
}
function areaPoint(lambda, phi) {
lambda *= radians, phi *= radians;
phi = phi / 2 + quarterPi; // half the angular distance from south pole
// Spherical excess E for a spherical triangle with vertices: south pole,
// previous point, current point. Uses a formula derived from Cagnoli’s
// theorem. See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2).
var dLambda = lambda - lambda0,
sdLambda = dLambda >= 0 ? 1 : -1,
adLambda = sdLambda * dLambda,
cosPhi = cos$1(phi),
sinPhi = sin$1(phi),
k = sinPhi0 * sinPhi,
u = cosPhi0 * cosPhi + k * cos$1(adLambda),
v = k * sdLambda * sin$1(adLambda);
areaRingSum.add(atan2(v, u));
// Advance the previous points.
lambda0 = lambda, cosPhi0 = cosPhi, sinPhi0 = sinPhi;
}
var area = function(object) {
areaSum.reset();
geoStream(object, areaStream);
return areaSum * 2;
};
function spherical(cartesian) {
return [atan2(cartesian[1], cartesian[0]), asin(cartesian[2])];
}
function cartesian(spherical) {
var lambda = spherical[0], phi = spherical[1], cosPhi = cos$1(phi);
return [cosPhi * cos$1(lambda), cosPhi * sin$1(lambda), sin$1(phi)];
}
function cartesianDot(a, b) {
return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
}
function cartesianCross(a, b) {
return [a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]];
}
// TODO return a
function cartesianAddInPlace(a, b) {
a[0] += b[0], a[1] += b[1], a[2] += b[2];
}
function cartesianScale(vector, k) {
return [vector[0] * k, vector[1] * k, vector[2] * k];
}
// TODO return d
function cartesianNormalizeInPlace(d) {
var l = sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
d[0] /= l, d[1] /= l, d[2] /= l;
}
var lambda0$1;
var phi0;
var lambda1;
var phi1;
var lambda2;
var lambda00$1;
var phi00$1;
var p0;
var deltaSum = adder();
var ranges;
var range;
var boundsStream = {
point: boundsPoint,
lineStart: boundsLineStart,
lineEnd: boundsLineEnd,
polygonStart: function() {
boundsStream.point = boundsRingPoint;
boundsStream.lineStart = boundsRingStart;
boundsStream.lineEnd = boundsRingEnd;
deltaSum.reset();
areaStream.polygonStart();
},
polygonEnd: function() {
areaStream.polygonEnd();
boundsStream.point = boundsPoint;
boundsStream.lineStart = boundsLineStart;
boundsStream.lineEnd = boundsLineEnd;
if (areaRingSum < 0) lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);
else if (deltaSum > epsilon$2) phi1 = 90;
else if (deltaSum < -epsilon$2) phi0 = -90;
range[0] = lambda0$1, range[1] = lambda1;
}
};
function boundsPoint(lambda, phi) {
ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
if (phi < phi0) phi0 = phi;
if (phi > phi1) phi1 = phi;
}
function linePoint(lambda, phi) {
var p = cartesian([lambda * radians, phi * radians]);
if (p0) {
var normal = cartesianCross(p0, p),
equatorial = [normal[1], -normal[0], 0],
inflection = cartesianCross(equatorial, normal);
cartesianNormalizeInPlace(inflection);
inflection = spherical(inflection);
var delta = lambda - lambda2,
sign$$1 = delta > 0 ? 1 : -1,
lambdai = inflection[0] * degrees$1 * sign$$1,
phii,
antimeridian = abs(delta) > 180;
if (antimeridian ^ (sign$$1 * lambda2 < lambdai && lambdai < sign$$1 * lambda)) {
phii = inflection[1] * degrees$1;
if (phii > phi1) phi1 = phii;
} else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign$$1 * lambda2 < lambdai && lambdai < sign$$1 * lambda)) {
phii = -inflection[1] * degrees$1;
if (phii < phi0) phi0 = phii;
} else {
if (phi < phi0) phi0 = phi;
if (phi > phi1) phi1 = phi;
}
if (antimeridian) {
if (lambda < lambda2) {
if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
} else {
if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
}
} else {
if (lambda1 >= lambda0$1) {
if (lambda < lambda0$1) lambda0$1 = lambda;
if (lambda > lambda1) lambda1 = lambda;
} else {
if (lambda > lambda2) {
if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
} else {
if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
}
}
}
} else {
ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
}
if (phi < phi0) phi0 = phi;
if (phi > phi1) phi1 = phi;
p0 = p, lambda2 = lambda;
}
function boundsLineStart() {
boundsStream.point = linePoint;
}
function boundsLineEnd() {
range[0] = lambda0$1, range[1] = lambda1;
boundsStream.point = boundsPoint;
p0 = null;
}
function boundsRingPoint(lambda, phi) {
if (p0) {
var delta = lambda - lambda2;
deltaSum.add(abs(delta) > 180 ? delta + (delta > 0 ? 360 : -360) : delta);
} else {
lambda00$1 = lambda, phi00$1 = phi;
}
areaStream.point(lambda, phi);
linePoint(lambda, phi);
}
function boundsRingStart() {
areaStream.lineStart();
}
function boundsRingEnd() {
boundsRingPoint(lambda00$1, phi00$1);
areaStream.lineEnd();
if (abs(deltaSum) > epsilon$2) lambda0$1 = -(lambda1 = 180);
range[0] = lambda0$1, range[1] = lambda1;
p0 = null;
}
// Finds the left-right distance between two longitudes.
// This is almost the same as (lambda1 - lambda0 + 360°) % 360°, except that we want
// the distance between ±180° to be 360°.
function angle(lambda0, lambda1) {
return (lambda1 -= lambda0) < 0 ? lambda1 + 360 : lambda1;
}
function rangeCompare(a, b) {
return a[0] - b[0];
}
function rangeContains(range, x) {
return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;
}
var bounds = function(feature) {
var i, n, a, b, merged, deltaMax, delta;
phi1 = lambda1 = -(lambda0$1 = phi0 = Infinity);
ranges = [];
geoStream(feature, boundsStream);
// First, sort ranges by their minimum longitudes.
if (n = ranges.length) {
ranges.sort(rangeCompare);
// Then, merge any ranges that overlap.
for (i = 1, a = ranges[0], merged = [a]; i < n; ++i) {
b = ranges[i];
if (rangeContains(a, b[0]) || rangeContains(a, b[1])) {
if (angle(a[0], b[1]) > angle(a[0], a[1])) a[1] = b[1];
if (angle(b[0], a[1]) > angle(a[0], a[1])) a[0] = b[0];
} else {
merged.push(a = b);
}
}
// Finally, find the largest gap between the merged ranges.
// The final bounding box will be the inverse of this gap.
for (deltaMax = -Infinity, n = merged.length - 1, i = 0, a = merged[n]; i <= n; a = b, ++i) {
b = merged[i];
if ((delta = angle(a[1], b[0])) > deltaMax) deltaMax = delta, lambda0$1 = b[0], lambda1 = a[1];
}
}
ranges = range = null;
return lambda0$1 === Infinity || phi0 === Infinity
? [[NaN, NaN], [NaN, NaN]]
: [[lambda0$1, phi0], [lambda1, phi1]];
};
var W0;
var W1;
var X0;
var Y0;
var Z0;
var X1;
var Y1;
var Z1;
var X2;
var Y2;
var Z2;
var lambda00$2;
var phi00$2;
var x0;
var y0;
var z0; // previous point
var centroidStream = {
sphere: noop$1,
point: centroidPoint,
lineStart: centroidLineStart,
lineEnd: centroidLineEnd,
polygonStart: function() {
centroidStream.lineStart = centroidRingStart;
centroidStream.lineEnd = centroidRingEnd;
},
polygonEnd: function() {
centroidStream.lineStart = centroidLineStart;
centroidStream.lineEnd = centroidLineEnd;
}
};
// Arithmetic mean of Cartesian vectors.
function centroidPoint(lambda, phi) {
lambda *= radians, phi *= radians;
var cosPhi = cos$1(phi);
centroidPointCartesian(cosPhi * cos$1(lambda), cosPhi * sin$1(lambda), sin$1(phi));
}
function centroidPointCartesian(x, y, z) {
++W0;
X0 += (x - X0) / W0;
Y0 += (y - Y0) / W0;
Z0 += (z - Z0) / W0;
}
function centroidLineStart() {
centroidStream.point = centroidLinePointFirst;
}
function centroidLinePointFirst(lambda, phi) {
lambda *= radians, phi *= radians;
var cosPhi = cos$1(phi);
x0 = cosPhi * cos$1(lambda);
y0 = cosPhi * sin$1(lambda);
z0 = sin$1(phi);
centroidStream.point = centroidLinePoint;
centroidPointCartesian(x0, y0, z0);
}
function centroidLinePoint(lambda, phi) {
lambda *= radians, phi *= radians;
var cosPhi = cos$1(phi),
x = cosPhi * cos$1(lambda),
y = cosPhi * sin$1(lambda),
z = sin$1(phi),
w = atan2(sqrt((w = y0 * z - z0 * y) * w + (w = z0 * x - x0 * z) * w + (w = x0 * y - y0 * x) * w), x0 * x + y0 * y + z0 * z);
W1 += w;
X1 += w * (x0 + (x0 = x));
Y1 += w * (y0 + (y0 = y));
Z1 += w * (z0 + (z0 = z));
centroidPointCartesian(x0, y0, z0);
}
function centroidLineEnd() {
centroidStream.point = centroidPoint;
}
// See J. E. Brock, The Inertia Tensor for a Spherical Triangle,
// J. Applied Mechanics 42, 239 (1975).
function centroidRingStart() {
centroidStream.point = centroidRingPointFirst;
}
function centroidRingEnd() {
centroidRingPoint(lambda00$2, phi00$2);
centroidStream.point = centroidPoint;
}
function centroidRingPointFirst(lambda, phi) {
lambda00$2 = lambda, phi00$2 = phi;
lambda *= radians, phi *= radians;
centroidStream.point = centroidRingPoint;
var cosPhi = cos$1(phi);
x0 = cosPhi * cos$1(lambda);
y0 = cosPhi * sin$1(lambda);
z0 = sin$1(phi);
centroidPointCartesian(x0, y0, z0);
}
function centroidRingPoint(lambda, phi) {
lambda *= radians, phi *= radians;
var cosPhi = cos$1(phi),
x = cosPhi * cos$1(lambda),
y = cosPhi * sin$1(lambda),
z = sin$1(phi),
cx = y0 * z - z0 * y,
cy = z0 * x - x0 * z,
cz = x0 * y - y0 * x,
m = sqrt(cx * cx + cy * cy + cz * cz),
w = asin(m), // line weight = angle
v = m && -w / m; // area weight multiplier
X2 += v * cx;
Y2 += v * cy;
Z2 += v * cz;
W1 += w;
X1 += w * (x0 + (x0 = x));
Y1 += w * (y0 + (y0 = y));
Z1 += w * (z0 + (z0 = z));
centroidPointCartesian(x0, y0, z0);
}
var centroid = function(object) {
W0 = W1 =
X0 = Y0 = Z0 =
X1 = Y1 = Z1 =
X2 = Y2 = Z2 = 0;
geoStream(object, centroidStream);
var x = X2,
y = Y2,
z = Z2,
m = x * x + y * y + z * z;
// If the area-weighted ccentroid is undefined, fall back to length-weighted ccentroid.
if (m < epsilon2$1) {
x = X1, y = Y1, z = Z1;
// If the feature has zero length, fall back to arithmetic mean of point vectors.
if (W1 < epsilon$2) x = X0, y = Y0, z = Z0;
m = x * x + y * y + z * z;
// If the feature still has an undefined ccentroid, then return.
if (m < epsilon2$1) return [NaN, NaN];
}
return [atan2(y, x) * degrees$1, asin(z / sqrt(m)) * degrees$1];
};
var constant$7 = function(x) {
return function() {
return x;
};
};
var compose = function(a, b) {
function compose(x, y) {
return x = a(x, y), b(x[0], x[1]);
}
if (a.invert && b.invert) compose.invert = function(x, y) {
return x = b.invert(x, y), x && a.invert(x[0], x[1]);
};
return compose;
};
function rotationIdentity(lambda, phi) {
return [lambda > pi$3 ? lambda - tau$3 : lambda < -pi$3 ? lambda + tau$3 : lambda, phi];
}
rotationIdentity.invert = rotationIdentity;
function rotateRadians(deltaLambda, deltaPhi, deltaGamma) {
return (deltaLambda %= tau$3) ? (deltaPhi || deltaGamma ? compose(rotationLambda(deltaLambda), rotationPhiGamma(deltaPhi, deltaGamma))
: rotationLambda(deltaLambda))
: (deltaPhi || deltaGamma ? rotationPhiGamma(deltaPhi, deltaGamma)
: rotationIdentity);
}
function forwardRotationLambda(deltaLambda) {
return function(lambda, phi) {
return lambda += deltaLambda, [lambda > pi$3 ? lambda - tau$3 : lambda < -pi$3 ? lambda + tau$3 : lambda, phi];
};
}
function rotationLambda(deltaLambda) {
var rotation = forwardRotationLambda(deltaLambda);
rotation.invert = forwardRotationLambda(-deltaLambda);
return rotation;
}
function rotationPhiGamma(deltaPhi, deltaGamma) {
var cosDeltaPhi = cos$1(deltaPhi),
sinDeltaPhi = sin$1(deltaPhi),
cosDeltaGamma = cos$1(deltaGamma),
sinDeltaGamma = sin$1(deltaGamma);
function rotation(lambda, phi) {
var cosPhi = cos$1(phi),
x = cos$1(lambda) * cosPhi,
y = sin$1(lambda) * cosPhi,
z = sin$1(phi),
k = z * cosDeltaPhi + x * sinDeltaPhi;
return [
atan2(y * cosDeltaGamma - k * sinDeltaGamma, x * cosDeltaPhi - z * sinDeltaPhi),
asin(k * cosDeltaGamma + y * sinDeltaGamma)
];
}
rotation.invert = function(lambda, phi) {
var cosPhi = cos$1(phi),
x = cos$1(lambda) * cosPhi,
y = sin$1(lambda) * cosPhi,
z = sin$1(phi),
k = z * cosDeltaGamma - y * sinDeltaGamma;
return [
atan2(y * cosDeltaGamma + z * sinDeltaGamma, x * cosDeltaPhi + k * sinDeltaPhi),
asin(k * cosDeltaPhi - x * sinDeltaPhi)
];
};
return rotation;
}
var rotation = function(rotate) {
rotate = rotateRadians(rotate[0] * radians, rotate[1] * radians, rotate.length > 2 ? rotate[2] * radians : 0);
function forward(coordinates) {
coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians);
return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;
}
forward.invert = function(coordinates) {
coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians);
return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;
};
return forward;
};
// Generates a circle centered at [0°, 0°], with a given radius and precision.
function circleStream(stream, radius, delta, direction, t0, t1) {
if (!delta) return;
var cosRadius = cos$1(radius),
sinRadius = sin$1(radius),
step = direction * delta;
if (t0 == null) {
t0 = radius + direction * tau$3;
t1 = radius - step / 2;
} else {
t0 = circleRadius(cosRadius, t0);
t1 = circleRadius(cosRadius, t1);
if (direction > 0 ? t0 < t1 : t0 > t1) t0 += direction * tau$3;
}
for (var point, t = t0; direction > 0 ? t > t1 : t < t1; t -= step) {
point = spherical([cosRadius, -sinRadius * cos$1(t), -sinRadius * sin$1(t)]);
stream.point(point[0], point[1]);
}
}
// Returns the signed angle of a cartesian point relative to [cosRadius, 0, 0].
function circleRadius(cosRadius, point) {
point = cartesian(point), point[0] -= cosRadius;
cartesianNormalizeInPlace(point);
var radius = acos(-point[1]);
return ((-point[2] < 0 ? -radius : radius) + tau$3 - epsilon$2) % tau$3;
}
var circle = function() {
var center = constant$7([0, 0]),
radius = constant$7(90),
precision = constant$7(6),
ring,
rotate,
stream = {point: point};
function point(x, y) {
ring.push(x = rotate(x, y));
x[0] *= degrees$1, x[1] *= degrees$1;
}
function circle() {
var c = center.apply(this, arguments),
r = radius.apply(this, arguments) * radians,
p = precision.apply(this, arguments) * radians;
ring = [];
rotate = rotateRadians(-c[0] * radians, -c[1] * radians, 0).invert;
circleStream(stream, r, p, 1);
c = {type: "Polygon", coordinates: [ring]};
ring = rotate = null;
return c;
}
circle.center = function(_) {
return arguments.length ? (center = typeof _ === "function" ? _ : constant$7([+_[0], +_[1]]), circle) : center;
};
circle.radius = function(_) {
return arguments.length ? (radius = typeof _ === "function" ? _ : constant$7(+_), circle) : radius;
};
circle.precision = function(_) {
return arguments.length ? (precision = typeof _ === "function" ? _ : constant$7(+_), circle) : precision;
};
return circle;
};
var clipBuffer = function() {
var lines = [],
line;
return {
point: function(x, y) {
line.push([x, y]);
},
lineStart: function() {
lines.push(line = []);
},
lineEnd: noop$1,
rejoin: function() {
if (lines.length > 1) lines.push(lines.pop().concat(lines.shift()));
},
result: function() {
var result = lines;
lines = [];
line = null;
return result;
}
};
};
var clipLine = function(a, b, x0, y0, x1, y1) {
var ax = a[0],
ay = a[1],
bx = b[0],
by = b[1],
t0 = 0,
t1 = 1,
dx = bx - ax,
dy = by - ay,
r;
r = x0 - ax;
if (!dx && r > 0) return;
r /= dx;
if (dx < 0) {
if (r < t0) return;
if (r < t1) t1 = r;
} else if (dx > 0) {
if (r > t1) return;
if (r > t0) t0 = r;
}
r = x1 - ax;
if (!dx && r < 0) return;
r /= dx;
if (dx < 0) {
if (r > t1) return;
if (r > t0) t0 = r;
} else if (dx > 0) {
if (r < t0) return;
if (r < t1) t1 = r;
}
r = y0 - ay;
if (!dy && r > 0) return;
r /= dy;
if (dy < 0) {
if (r < t0) return;
if (r < t1) t1 = r;
} else if (dy > 0) {
if (r > t1) return;
if (r > t0) t0 = r;
}
r = y1 - ay;
if (!dy && r < 0) return;
r /= dy;
if (dy < 0) {
if (r > t1) return;
if (r > t0) t0 = r;
} else if (dy > 0) {
if (r < t0) return;
if (r < t1) t1 = r;
}
if (t0 > 0) a[0] = ax + t0 * dx, a[1] = ay + t0 * dy;
if (t1 < 1) b[0] = ax + t1 * dx, b[1] = ay + t1 * dy;
return true;
};
var pointEqual = function(a, b) {
return abs(a[0] - b[0]) < epsilon$2 && abs(a[1] - b[1]) < epsilon$2;
};
function Intersection(point, points, other, entry) {
this.x = point;
this.z = points;
this.o = other; // another intersection
this.e = entry; // is an entry?
this.v = false; // visited
this.n = this.p = null; // next & previous
}
// A generalized polygon clipping algorithm: given a polygon that has been cut
// into its visible line segments, and rejoins the segments by interpolating
// along the clip edge.
var clipPolygon = function(segments, compareIntersection, startInside, interpolate, stream) {
var subject = [],
clip = [],
i,
n;
segments.forEach(function(segment) {
if ((n = segment.length - 1) <= 0) return;
var n, p0 = segment[0], p1 = segment[n], x;
// If the first and last points of a segment are coincident, then treat as a
// closed ring. TODO if all rings are closed, then the winding order of the
// exterior ring should be checked.
if (pointEqual(p0, p1)) {
stream.lineStart();
for (i = 0; i < n; ++i) stream.point((p0 = segment[i])[0], p0[1]);
stream.lineEnd();
return;
}
subject.push(x = new Intersection(p0, segment, null, true));
clip.push(x.o = new Intersection(p0, null, x, false));
subject.push(x = new Intersection(p1, segment, null, false));
clip.push(x.o = new Intersection(p1, null, x, true));
});
if (!subject.length) return;
clip.sort(compareIntersection);
link$1(subject);
link$1(clip);
for (i = 0, n = clip.length; i < n; ++i) {
clip[i].e = startInside = !startInside;
}
var start = subject[0],
points,
point;
while (1) {
// Find first unvisited intersection.
var current = start,
isSubject = true;
while (current.v) if ((current = current.n) === start) return;
points = current.z;
stream.lineStart();
do {
current.v = current.o.v = true;
if (current.e) {
if (isSubject) {
for (i = 0, n = points.length; i < n; ++i) stream.point((point = points[i])[0], point[1]);
} else {
interpolate(current.x, current.n.x, 1, stream);
}
current = current.n;
} else {
if (isSubject) {
points = current.p.z;
for (i = points.length - 1; i >= 0; --i) stream.point((point = points[i])[0], point[1]);
} else {
interpolate(current.x, current.p.x, -1, stream);
}
current = current.p;
}
current = current.o;
points = current.z;
isSubject = !isSubject;
} while (!current.v);
stream.lineEnd();
}
};
function link$1(array) {
if (!(n = array.length)) return;
var n,
i = 0,
a = array[0],
b;
while (++i < n) {
a.n = b = array[i];
b.p = a;
a = b;
}
a.n = b = array[0];
b.p = a;
}
var clipMax = 1e9;
var clipMin = -clipMax;
// TODO Use d3-polygon’s polygonContains here for the ring check?
// TODO Eliminate duplicate buffering in clipBuffer and polygon.push?
function clipExtent(x0, y0, x1, y1) {
function visible(x, y) {
return x0 <= x && x <= x1 && y0 <= y && y <= y1;
}
function interpolate(from, to, direction, stream) {
var a = 0, a1 = 0;
if (from == null
|| (a = corner(from, direction)) !== (a1 = corner(to, direction))
|| comparePoint(from, to) < 0 ^ direction > 0) {
do stream.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0);
while ((a = (a + direction + 4) % 4) !== a1);
} else {
stream.point(to[0], to[1]);
}
}
function corner(p, direction) {
return abs(p[0] - x0) < epsilon$2 ? direction > 0 ? 0 : 3
: abs(p[0] - x1) < epsilon$2 ? direction > 0 ? 2 : 1
: abs(p[1] - y0) < epsilon$2 ? direction > 0 ? 1 : 0
: direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon
}
function compareIntersection(a, b) {
return comparePoint(a.x, b.x);
}
function comparePoint(a, b) {
var ca = corner(a, 1),
cb = corner(b, 1);
return ca !== cb ? ca - cb
: ca === 0 ? b[1] - a[1]
: ca === 1 ? a[0] - b[0]
: ca === 2 ? a[1] - b[1]
: b[0] - a[0];
}
return function(stream) {
var activeStream = stream,
bufferStream = clipBuffer(),
segments,
polygon,
ring,
x__, y__, v__, // first point
x_, y_, v_, // previous point
first,
clean;
var clipStream = {
point: point,
lineStart: lineStart,
lineEnd: lineEnd,
polygonStart: polygonStart,
polygonEnd: polygonEnd
};
function point(x, y) {
if (visible(x, y)) activeStream.point(x, y);
}
function polygonInside() {
var winding = 0;
for (var i = 0, n = polygon.length; i < n; ++i) {
for (var ring = polygon[i], j = 1, m = ring.length, point = ring[0], a0, a1, b0 = point[0], b1 = point[1]; j < m; ++j) {
a0 = b0, a1 = b1, point = ring[j], b0 = point[0], b1 = point[1];
if (a1 <= y1) { if (b1 > y1 && (b0 - a0) * (y1 - a1) > (b1 - a1) * (x0 - a0)) ++winding; }
else { if (b1 <= y1 && (b0 - a0) * (y1 - a1) < (b1 - a1) * (x0 - a0)) --winding; }
}
}
return winding;
}
// Buffer geometry within a polygon and then clip it en masse.
function polygonStart() {
activeStream = bufferStream, segments = [], polygon = [], clean = true;
}
function polygonEnd() {
var startInside = polygonInside(),
cleanInside = clean && startInside,
visible = (segments = merge(segments)).length;
if (cleanInside || visible) {
stream.polygonStart();
if (cleanInside) {
stream.lineStart();
interpolate(null, null, 1, stream);
stream.lineEnd();
}
if (visible) {
clipPolygon(segments, compareIntersection, startInside, interpolate, stream);
}
stream.polygonEnd();
}
activeStream = stream, segments = polygon = ring = null;
}
function lineStart() {
clipStream.point = linePoint;
if (polygon) polygon.push(ring = []);
first = true;
v_ = false;
x_ = y_ = NaN;
}
// TODO rather than special-case polygons, simply handle them separately.
// Ideally, coincident intersection points should be jittered to avoid
// clipping issues.
function lineEnd() {
if (segments) {
linePoint(x__, y__);
if (v__ && v_) bufferStream.rejoin();
segments.push(bufferStream.result());
}
clipStream.point = point;
if (v_) activeStream.lineEnd();
}
function linePoint(x, y) {
var v = visible(x, y);
if (polygon) ring.push([x, y]);
if (first) {
x__ = x, y__ = y, v__ = v;
first = false;
if (v) {
activeStream.lineStart();
activeStream.point(x, y);
}
} else {
if (v && v_) activeStream.point(x, y);
else {
var a = [x_ = Math.max(clipMin, Math.min(clipMax, x_)), y_ = Math.max(clipMin, Math.min(clipMax, y_))],
b = [x = Math.max(clipMin, Math.min(clipMax, x)), y = Math.max(clipMin, Math.min(clipMax, y))];
if (clipLine(a, b, x0, y0, x1, y1)) {
if (!v_) {
activeStream.lineStart();
activeStream.point(a[0], a[1]);
}
activeStream.point(b[0], b[1]);
if (!v) activeStream.lineEnd();
clean = false;
} else if (v) {
activeStream.lineStart();
activeStream.point(x, y);
clean = false;
}
}
}
x_ = x, y_ = y, v_ = v;
}
return clipStream;
};
}
var extent$1 = function() {
var x0 = 0,
y0 = 0,
x1 = 960,
y1 = 500,
cache,
cacheStream,
clip;
return clip = {
stream: function(stream) {
return cache && cacheStream === stream ? cache : cache = clipExtent(x0, y0, x1, y1)(cacheStream = stream);
},
extent: function(_) {
return arguments.length ? (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1], cache = cacheStream = null, clip) : [[x0, y0], [x1, y1]];
}
};
};
var sum$1 = adder();
var polygonContains = function(polygon, point) {
var lambda = point[0],
phi = point[1],
normal = [sin$1(lambda), -cos$1(lambda), 0],
angle = 0,
winding = 0;
sum$1.reset();
for (var i = 0, n = polygon.length; i < n; ++i) {
if (!(m = (ring = polygon[i]).length)) continue;
var ring,
m,
point0 = ring[m - 1],
lambda0 = point0[0],
phi0 = point0[1] / 2 + quarterPi,
sinPhi0 = sin$1(phi0),
cosPhi0 = cos$1(phi0);
for (var j = 0; j < m; ++j, lambda0 = lambda1, sinPhi0 = sinPhi1, cosPhi0 = cosPhi1, point0 = point1) {
var point1 = ring[j],
lambda1 = point1[0],
phi1 = point1[1] / 2 + quarterPi,
sinPhi1 = sin$1(phi1),
cosPhi1 = cos$1(phi1),
delta = lambda1 - lambda0,
sign$$1 = delta >= 0 ? 1 : -1,
absDelta = sign$$1 * delta,
antimeridian = absDelta > pi$3,
k = sinPhi0 * sinPhi1;
sum$1.add(atan2(k * sign$$1 * sin$1(absDelta), cosPhi0 * cosPhi1 + k * cos$1(absDelta)));
angle += antimeridian ? delta + sign$$1 * tau$3 : delta;
// Are the longitudes either side of the point’s meridian (lambda),
// and are the latitudes smaller than the parallel (phi)?
if (antimeridian ^ lambda0 >= lambda ^ lambda1 >= lambda) {
var arc = cartesianCross(cartesian(point0), cartesian(point1));
cartesianNormalizeInPlace(arc);
var intersection = cartesianCross(normal, arc);
cartesianNormalizeInPlace(intersection);
var phiArc = (antimeridian ^ delta >= 0 ? -1 : 1) * asin(intersection[2]);
if (phi > phiArc || phi === phiArc && (arc[0] || arc[1])) {
winding += antimeridian ^ delta >= 0 ? 1 : -1;
}
}
}
}
// First, determine whether the South pole is inside or outside:
//
// It is inside if:
// * the polygon winds around it in a clockwise direction.
// * the polygon does not (cumulatively) wind around it, but has a negative
// (counter-clockwise) area.
//
// Second, count the (signed) number of times a segment crosses a lambda
// from the point to the South pole. If it is zero, then the point is the
// same side as the South pole.
return (angle < -epsilon$2 || angle < epsilon$2 && sum$1 < -epsilon$2) ^ (winding & 1);
};
var lengthSum = adder();
var lambda0$2;
var sinPhi0$1;
var cosPhi0$1;
var lengthStream = {
sphere: noop$1,
point: noop$1,
lineStart: lengthLineStart,
lineEnd: noop$1,
polygonStart: noop$1,
polygonEnd: noop$1
};
function lengthLineStart() {
lengthStream.point = lengthPointFirst;
lengthStream.lineEnd = lengthLineEnd;
}
function lengthLineEnd() {
lengthStream.point = lengthStream.lineEnd = noop$1;
}
function lengthPointFirst(lambda, phi) {
lambda *= radians, phi *= radians;
lambda0$2 = lambda, sinPhi0$1 = sin$1(phi), cosPhi0$1 = cos$1(phi);
lengthStream.point = lengthPoint;
}
function lengthPoint(lambda, phi) {
lambda *= radians, phi *= radians;
var sinPhi = sin$1(phi),
cosPhi = cos$1(phi),
delta = abs(lambda - lambda0$2),
cosDelta = cos$1(delta),
sinDelta = sin$1(delta),
x = cosPhi * sinDelta,
y = cosPhi0$1 * sinPhi - sinPhi0$1 * cosPhi * cosDelta,
z = sinPhi0$1 * sinPhi + cosPhi0$1 * cosPhi * cosDelta;
lengthSum.add(atan2(sqrt(x * x + y * y), z));
lambda0$2 = lambda, sinPhi0$1 = sinPhi, cosPhi0$1 = cosPhi;
}
var length$1 = function(object) {
lengthSum.reset();
geoStream(object, lengthStream);
return +lengthSum;
};
var coordinates = [null, null];
var object$1 = {type: "LineString", coordinates: coordinates};
var distance = function(a, b) {
coordinates[0] = a;
coordinates[1] = b;
return length$1(object$1);
};
var containsObjectType = {
Feature: function(object, point) {
return containsGeometry(object.geometry, point);
},
FeatureCollection: function(object, point) {
var features = object.features, i = -1, n = features.length;
while (++i < n) if (containsGeometry(features[i].geometry, point)) return true;
return false;
}
};
var containsGeometryType = {
Sphere: function() {
return true;
},
Point: function(object, point) {
return containsPoint(object.coordinates, point);
},
MultiPoint: function(object, point) {
var coordinates = object.coordinates, i = -1, n = coordinates.length;
while (++i < n) if (containsPoint(coordinates[i], point)) return true;
return false;
},
LineString: function(object, point) {
return containsLine(object.coordinates, point);
},
MultiLineString: function(object, point) {
var coordinates = object.coordinates, i = -1, n = coordinates.length;
while (++i < n) if (containsLine(coordinates[i], point)) return true;
return false;
},
Polygon: function(object, point) {
return containsPolygon(object.coordinates, point);
},
MultiPolygon: function(object, point) {
var coordinates = object.coordinates, i = -1, n = coordinates.length;
while (++i < n) if (containsPolygon(coordinates[i], point)) return true;
return false;
},
GeometryCollection: function(object, point) {
var geometries = object.geometries, i = -1, n = geometries.length;
while (++i < n) if (containsGeometry(geometries[i], point)) return true;
return false;
}
};
function containsGeometry(geometry, point) {
return geometry && containsGeometryType.hasOwnProperty(geometry.type)
? containsGeometryType[geometry.type](geometry, point)
: false;
}
function containsPoint(coordinates, point) {
return distance(coordinates, point) === 0;
}
function containsLine(coordinates, point) {
var ab = distance(coordinates[0], coordinates[1]),
ao = distance(coordinates[0], point),
ob = distance(point, coordinates[1]);
return ao + ob <= ab + epsilon$2;
}
function containsPolygon(coordinates, point) {
return !!polygonContains(coordinates.map(ringRadians), pointRadians(point));
}
function ringRadians(ring) {
return ring = ring.map(pointRadians), ring.pop(), ring;
}
function pointRadians(point) {
return [point[0] * radians, point[1] * radians];
}
var contains = function(object, point) {
return (object && containsObjectType.hasOwnProperty(object.type)
? containsObjectType[object.type]
: containsGeometry)(object, point);
};
function graticuleX(y0, y1, dy) {
var y = sequence(y0, y1 - epsilon$2, dy).concat(y1);
return function(x) { return y.map(function(y) { return [x, y]; }); };
}
function graticuleY(x0, x1, dx) {
var x = sequence(x0, x1 - epsilon$2, dx).concat(x1);
return function(y) { return x.map(function(x) { return [x, y]; }); };
}
function graticule() {
var x1, x0, X1, X0,
y1, y0, Y1, Y0,
dx = 10, dy = dx, DX = 90, DY = 360,
x, y, X, Y,
precision = 2.5;
function graticule() {
return {type: "MultiLineString", coordinates: lines()};
}
function lines() {
return sequence(ceil(X0 / DX) * DX, X1, DX).map(X)
.concat(sequence(ceil(Y0 / DY) * DY, Y1, DY).map(Y))
.concat(sequence(ceil(x0 / dx) * dx, x1, dx).filter(function(x) { return abs(x % DX) > epsilon$2; }).map(x))
.concat(sequence(ceil(y0 / dy) * dy, y1, dy).filter(function(y) { return abs(y % DY) > epsilon$2; }).map(y));
}
graticule.lines = function() {
return lines().map(function(coordinates) { return {type: "LineString", coordinates: coordinates}; });
};
graticule.outline = function() {
return {
type: "Polygon",
coordinates: [
X(X0).concat(
Y(Y1).slice(1),
X(X1).reverse().slice(1),
Y(Y0).reverse().slice(1))
]
};
};
graticule.extent = function(_) {
if (!arguments.length) return graticule.extentMinor();
return graticule.extentMajor(_).extentMinor(_);
};
graticule.extentMajor = function(_) {
if (!arguments.length) return [[X0, Y0], [X1, Y1]];
X0 = +_[0][0], X1 = +_[1][0];
Y0 = +_[0][1], Y1 = +_[1][1];
if (X0 > X1) _ = X0, X0 = X1, X1 = _;
if (Y0 > Y1) _ = Y0, Y0 = Y1, Y1 = _;
return graticule.precision(precision);
};
graticule.extentMinor = function(_) {
if (!arguments.length) return [[x0, y0], [x1, y1]];
x0 = +_[0][0], x1 = +_[1][0];
y0 = +_[0][1], y1 = +_[1][1];
if (x0 > x1) _ = x0, x0 = x1, x1 = _;
if (y0 > y1) _ = y0, y0 = y1, y1 = _;
return graticule.precision(precision);
};
graticule.step = function(_) {
if (!arguments.length) return graticule.stepMinor();
return graticule.stepMajor(_).stepMinor(_);
};
graticule.stepMajor = function(_) {
if (!arguments.length) return [DX, DY];
DX = +_[0], DY = +_[1];
return graticule;
};
graticule.stepMinor = function(_) {
if (!arguments.length) return [dx, dy];
dx = +_[0], dy = +_[1];
return graticule;
};
graticule.precision = function(_) {
if (!arguments.length) return precision;
precision = +_;
x = graticuleX(y0, y1, 90);
y = graticuleY(x0, x1, precision);
X = graticuleX(Y0, Y1, 90);
Y = graticuleY(X0, X1, precision);
return graticule;
};
return graticule
.extentMajor([[-180, -90 + epsilon$2], [180, 90 - epsilon$2]])
.extentMinor([[-180, -80 - epsilon$2], [180, 80 + epsilon$2]]);
}
function graticule10() {
return graticule()();
}
var interpolate$1 = function(a, b) {
var x0 = a[0] * radians,
y0 = a[1] * radians,
x1 = b[0] * radians,
y1 = b[1] * radians,
cy0 = cos$1(y0),
sy0 = sin$1(y0),
cy1 = cos$1(y1),
sy1 = sin$1(y1),
kx0 = cy0 * cos$1(x0),
ky0 = cy0 * sin$1(x0),
kx1 = cy1 * cos$1(x1),
ky1 = cy1 * sin$1(x1),
d = 2 * asin(sqrt(haversin(y1 - y0) + cy0 * cy1 * haversin(x1 - x0))),
k = sin$1(d);
var interpolate = d ? function(t) {
var B = sin$1(t *= d) / k,
A = sin$1(d - t) / k,
x = A * kx0 + B * kx1,
y = A * ky0 + B * ky1,
z = A * sy0 + B * sy1;
return [
atan2(y, x) * degrees$1,
atan2(z, sqrt(x * x + y * y)) * degrees$1
];
} : function() {
return [x0 * degrees$1, y0 * degrees$1];
};
interpolate.distance = d;
return interpolate;
};
var identity$4 = function(x) {
return x;
};
var areaSum$1 = adder();
var areaRingSum$1 = adder();
var x00;
var y00;
var x0$1;
var y0$1;
var areaStream$1 = {
point: noop$1,
lineStart: noop$1,
lineEnd: noop$1,
polygonStart: function() {
areaStream$1.lineStart = areaRingStart$1;
areaStream$1.lineEnd = areaRingEnd$1;
},
polygonEnd: function() {
areaStream$1.lineStart = areaStream$1.lineEnd = areaStream$1.point = noop$1;
areaSum$1.add(abs(areaRingSum$1));
areaRingSum$1.reset();
},
result: function() {
var area = areaSum$1 / 2;
areaSum$1.reset();
return area;
}
};
function areaRingStart$1() {
areaStream$1.point = areaPointFirst$1;
}
function areaPointFirst$1(x, y) {
areaStream$1.point = areaPoint$1;
x00 = x0$1 = x, y00 = y0$1 = y;
}
function areaPoint$1(x, y) {
areaRingSum$1.add(y0$1 * x - x0$1 * y);
x0$1 = x, y0$1 = y;
}
function areaRingEnd$1() {
areaPoint$1(x00, y00);
}
var x0$2 = Infinity;
var y0$2 = x0$2;
var x1 = -x0$2;
var y1 = x1;
var boundsStream$1 = {
point: boundsPoint$1,
lineStart: noop$1,
lineEnd: noop$1,
polygonStart: noop$1,
polygonEnd: noop$1,
result: function() {
var bounds = [[x0$2, y0$2], [x1, y1]];
x1 = y1 = -(y0$2 = x0$2 = Infinity);
return bounds;
}
};
function boundsPoint$1(x, y) {
if (x < x0$2) x0$2 = x;
if (x > x1) x1 = x;
if (y < y0$2) y0$2 = y;
if (y > y1) y1 = y;
}
// TODO Enforce positive area for exterior, negative area for interior?
var X0$1 = 0;
var Y0$1 = 0;
var Z0$1 = 0;
var X1$1 = 0;
var Y1$1 = 0;
var Z1$1 = 0;
var X2$1 = 0;
var Y2$1 = 0;
var Z2$1 = 0;
var x00$1;
var y00$1;
var x0$3;
var y0$3;
var centroidStream$1 = {
point: centroidPoint$1,
lineStart: centroidLineStart$1,
lineEnd: centroidLineEnd$1,
polygonStart: function() {
centroidStream$1.lineStart = centroidRingStart$1;
centroidStream$1.lineEnd = centroidRingEnd$1;
},
polygonEnd: function() {
centroidStream$1.point = centroidPoint$1;
centroidStream$1.lineStart = centroidLineStart$1;
centroidStream$1.lineEnd = centroidLineEnd$1;
},
result: function() {
var centroid = Z2$1 ? [X2$1 / Z2$1, Y2$1 / Z2$1]
: Z1$1 ? [X1$1 / Z1$1, Y1$1 / Z1$1]
: Z0$1 ? [X0$1 / Z0$1, Y0$1 / Z0$1]
: [NaN, NaN];
X0$1 = Y0$1 = Z0$1 =
X1$1 = Y1$1 = Z1$1 =
X2$1 = Y2$1 = Z2$1 = 0;
return centroid;
}
};
function centroidPoint$1(x, y) {
X0$1 += x;
Y0$1 += y;
++Z0$1;
}
function centroidLineStart$1() {
centroidStream$1.point = centroidPointFirstLine;
}
function centroidPointFirstLine(x, y) {
centroidStream$1.point = centroidPointLine;
centroidPoint$1(x0$3 = x, y0$3 = y);
}
function centroidPointLine(x, y) {
var dx = x - x0$3, dy = y - y0$3, z = sqrt(dx * dx + dy * dy);
X1$1 += z * (x0$3 + x) / 2;
Y1$1 += z * (y0$3 + y) / 2;
Z1$1 += z;
centroidPoint$1(x0$3 = x, y0$3 = y);
}
function centroidLineEnd$1() {
centroidStream$1.point = centroidPoint$1;
}
function centroidRingStart$1() {
centroidStream$1.point = centroidPointFirstRing;
}
function centroidRingEnd$1() {
centroidPointRing(x00$1, y00$1);
}
function centroidPointFirstRing(x, y) {
centroidStream$1.point = centroidPointRing;
centroidPoint$1(x00$1 = x0$3 = x, y00$1 = y0$3 = y);
}
function centroidPointRing(x, y) {
var dx = x - x0$3,
dy = y - y0$3,
z = sqrt(dx * dx + dy * dy);
X1$1 += z * (x0$3 + x) / 2;
Y1$1 += z * (y0$3 + y) / 2;
Z1$1 += z;
z = y0$3 * x - x0$3 * y;
X2$1 += z * (x0$3 + x);
Y2$1 += z * (y0$3 + y);
Z2$1 += z * 3;
centroidPoint$1(x0$3 = x, y0$3 = y);
}
function PathContext(context) {
this._context = context;
}
PathContext.prototype = {
_radius: 4.5,
pointRadius: function(_) {
return this._radius = _, this;
},
polygonStart: function() {
this._line = 0;
},
polygonEnd: function() {
this._line = NaN;
},
lineStart: function() {
this._point = 0;
},
lineEnd: function() {
if (this._line === 0) this._context.closePath();
this._point = NaN;
},
point: function(x, y) {
switch (this._point) {
case 0: {
this._context.moveTo(x, y);
this._point = 1;
break;
}
case 1: {
this._context.lineTo(x, y);
break;
}
default: {
this._context.moveTo(x + this._radius, y);
this._context.arc(x, y, this._radius, 0, tau$3);
break;
}
}
},
result: noop$1
};
var lengthSum$1 = adder();
var lengthRing;
var x00$2;
var y00$2;
var x0$4;
var y0$4;
var lengthStream$1 = {
point: noop$1,
lineStart: function() {
lengthStream$1.point = lengthPointFirst$1;
},
lineEnd: function() {
if (lengthRing) lengthPoint$1(x00$2, y00$2);
lengthStream$1.point = noop$1;
},
polygonStart: function() {
lengthRing = true;
},
polygonEnd: function() {
lengthRing = null;
},
result: function() {
var length = +lengthSum$1;
lengthSum$1.reset();
return length;
}
};
function lengthPointFirst$1(x, y) {
lengthStream$1.point = lengthPoint$1;
x00$2 = x0$4 = x, y00$2 = y0$4 = y;
}
function lengthPoint$1(x, y) {
x0$4 -= x, y0$4 -= y;
lengthSum$1.add(sqrt(x0$4 * x0$4 + y0$4 * y0$4));
x0$4 = x, y0$4 = y;
}
function PathString() {
this._string = [];
}
PathString.prototype = {
_radius: 4.5,
_circle: circle$1(4.5),
pointRadius: function(_) {
if ((_ = +_) !== this._radius) this._radius = _, this._circle = null;
return this;
},
polygonStart: function() {
this._line = 0;
},
polygonEnd: function() {
this._line = NaN;
},
lineStart: function() {
this._point = 0;
},
lineEnd: function() {
if (this._line === 0) this._string.push("Z");
this._point = NaN;
},
point: function(x, y) {
switch (this._point) {
case 0: {
this._string.push("M", x, ",", y);
this._point = 1;
break;
}
case 1: {
this._string.push("L", x, ",", y);
break;
}
default: {
if (this._circle == null) this._circle = circle$1(this._radius);
this._string.push("M", x, ",", y, this._circle);
break;
}
}
},
result: function() {
if (this._string.length) {
var result = this._string.join("");
this._string = [];
return result;
} else {
return null;
}
}
};
function circle$1(radius) {
return "m0," + radius
+ "a" + radius + "," + radius + " 0 1,1 0," + -2 * radius
+ "a" + radius + "," + radius + " 0 1,1 0," + 2 * radius
+ "z";
}
var index$1 = function(projection, context) {
var pointRadius = 4.5,
projectionStream,
contextStream;
function path(object) {
if (object) {
if (typeof pointRadius === "function") contextStream.pointRadius(+pointRadius.apply(this, arguments));
geoStream(object, projectionStream(contextStream));
}
return contextStream.result();
}
path.area = function(object) {
geoStream(object, projectionStream(areaStream$1));
return areaStream$1.result();
};
path.measure = function(object) {
geoStream(object, projectionStream(lengthStream$1));
return lengthStream$1.result();
};
path.bounds = function(object) {
geoStream(object, projectionStream(boundsStream$1));
return boundsStream$1.result();
};
path.centroid = function(object) {
geoStream(object, projectionStream(centroidStream$1));
return centroidStream$1.result();
};
path.projection = function(_) {
return arguments.length ? (projectionStream = _ == null ? (projection = null, identity$4) : (projection = _).stream, path) : projection;
};
path.context = function(_) {
if (!arguments.length) return context;
contextStream = _ == null ? (context = null, new PathString) : new PathContext(context = _);
if (typeof pointRadius !== "function") contextStream.pointRadius(pointRadius);
return path;
};
path.pointRadius = function(_) {
if (!arguments.length) return pointRadius;
pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_);
return path;
};
return path.projection(projection).context(context);
};
var clip = function(pointVisible, clipLine, interpolate, start) {
return function(rotate, sink) {
var line = clipLine(sink),
rotatedStart = rotate.invert(start[0], start[1]),
ringBuffer = clipBuffer(),
ringSink = clipLine(ringBuffer),
polygonStarted = false,
polygon,
segments,
ring;
var clip = {
point: point,
lineStart: lineStart,
lineEnd: lineEnd,
polygonStart: function() {
clip.point = pointRing;
clip.lineStart = ringStart;
clip.lineEnd = ringEnd;
segments = [];
polygon = [];
},
polygonEnd: function() {
clip.point = point;
clip.lineStart = lineStart;
clip.lineEnd = lineEnd;
segments = merge(segments);
var startInside = polygonContains(polygon, rotatedStart);
if (segments.length) {
if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
clipPolygon(segments, compareIntersection, startInside, interpolate, sink);
} else if (startInside) {
if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
sink.lineStart();
interpolate(null, null, 1, sink);
sink.lineEnd();
}
if (polygonStarted) sink.polygonEnd(), polygonStarted = false;
segments = polygon = null;
},
sphere: function() {
sink.polygonStart();
sink.lineStart();
interpolate(null, null, 1, sink);
sink.lineEnd();
sink.polygonEnd();
}
};
function point(lambda, phi) {
var point = rotate(lambda, phi);
if (pointVisible(lambda = point[0], phi = point[1])) sink.point(lambda, phi);
}
function pointLine(lambda, phi) {
var point = rotate(lambda, phi);
line.point(point[0], point[1]);
}
function lineStart() {
clip.point = pointLine;
line.lineStart();
}
function lineEnd() {
clip.point = point;
line.lineEnd();
}
function pointRing(lambda, phi) {
ring.push([lambda, phi]);
var point = rotate(lambda, phi);
ringSink.point(point[0], point[1]);
}
function ringStart() {
ringSink.lineStart();
ring = [];
}
function ringEnd() {
pointRing(ring[0][0], ring[0][1]);
ringSink.lineEnd();
var clean = ringSink.clean(),
ringSegments = ringBuffer.result(),
i, n = ringSegments.length, m,
segment,
point;
ring.pop();
polygon.push(ring);
ring = null;
if (!n) return;
// No intersections.
if (clean & 1) {
segment = ringSegments[0];
if ((m = segment.length - 1) > 0) {
if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
sink.lineStart();
for (i = 0; i < m; ++i) sink.point((point = segment[i])[0], point[1]);
sink.lineEnd();
}
return;
}
// Rejoin connected segments.
// TODO reuse ringBuffer.rejoin()?
if (n > 1 && clean & 2) ringSegments.push(ringSegments.pop().concat(ringSegments.shift()));
segments.push(ringSegments.filter(validSegment));
}
return clip;
};
};
function validSegment(segment) {
return segment.length > 1;
}
// Intersections are sorted along the clip edge. For both antimeridian cutting
// and circle clipping, the same comparison is used.
function compareIntersection(a, b) {
return ((a = a.x)[0] < 0 ? a[1] - halfPi$2 - epsilon$2 : halfPi$2 - a[1])
- ((b = b.x)[0] < 0 ? b[1] - halfPi$2 - epsilon$2 : halfPi$2 - b[1]);
}
var clipAntimeridian = clip(
function() { return true; },
clipAntimeridianLine,
clipAntimeridianInterpolate,
[-pi$3, -halfPi$2]
);
// Takes a line and cuts into visible segments. Return values: 0 - there were
// intersections or the line was empty; 1 - no intersections; 2 - there were
// intersections, and the first and last segments should be rejoined.
function clipAntimeridianLine(stream) {
var lambda0 = NaN,
phi0 = NaN,
sign0 = NaN,
clean; // no intersections
return {
lineStart: function() {
stream.lineStart();
clean = 1;
},
point: function(lambda1, phi1) {
var sign1 = lambda1 > 0 ? pi$3 : -pi$3,
delta = abs(lambda1 - lambda0);
if (abs(delta - pi$3) < epsilon$2) { // line crosses a pole
stream.point(lambda0, phi0 = (phi0 + phi1) / 2 > 0 ? halfPi$2 : -halfPi$2);
stream.point(sign0, phi0);
stream.lineEnd();
stream.lineStart();
stream.point(sign1, phi0);
stream.point(lambda1, phi0);
clean = 0;
} else if (sign0 !== sign1 && delta >= pi$3) { // line crosses antimeridian
if (abs(lambda0 - sign0) < epsilon$2) lambda0 -= sign0 * epsilon$2; // handle degeneracies
if (abs(lambda1 - sign1) < epsilon$2) lambda1 -= sign1 * epsilon$2;
phi0 = clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1);
stream.point(sign0, phi0);
stream.lineEnd();
stream.lineStart();
stream.point(sign1, phi0);
clean = 0;
}
stream.point(lambda0 = lambda1, phi0 = phi1);
sign0 = sign1;
},
lineEnd: function() {
stream.lineEnd();
lambda0 = phi0 = NaN;
},
clean: function() {
return 2 - clean; // if intersections, rejoin first and last segments
}
};
}
function clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1) {
var cosPhi0,
cosPhi1,
sinLambda0Lambda1 = sin$1(lambda0 - lambda1);
return abs(sinLambda0Lambda1) > epsilon$2
? atan((sin$1(phi0) * (cosPhi1 = cos$1(phi1)) * sin$1(lambda1)
- sin$1(phi1) * (cosPhi0 = cos$1(phi0)) * sin$1(lambda0))
/ (cosPhi0 * cosPhi1 * sinLambda0Lambda1))
: (phi0 + phi1) / 2;
}
function clipAntimeridianInterpolate(from, to, direction, stream) {
var phi;
if (from == null) {
phi = direction * halfPi$2;
stream.point(-pi$3, phi);
stream.point(0, phi);
stream.point(pi$3, phi);
stream.point(pi$3, 0);
stream.point(pi$3, -phi);
stream.point(0, -phi);
stream.point(-pi$3, -phi);
stream.point(-pi$3, 0);
stream.point(-pi$3, phi);
} else if (abs(from[0] - to[0]) > epsilon$2) {
var lambda = from[0] < to[0] ? pi$3 : -pi$3;
phi = direction * lambda / 2;
stream.point(-lambda, phi);
stream.point(0, phi);
stream.point(lambda, phi);
} else {
stream.point(to[0], to[1]);
}
}
var clipCircle = function(radius, delta) {
var cr = cos$1(radius),
smallRadius = cr > 0,
notHemisphere = abs(cr) > epsilon$2; // TODO optimise for this common case
function interpolate(from, to, direction, stream) {
circleStream(stream, radius, delta, direction, from, to);
}
function visible(lambda, phi) {
return cos$1(lambda) * cos$1(phi) > cr;
}
// Takes a line and cuts into visible segments. Return values used for polygon
// clipping: 0 - there were intersections or the line was empty; 1 - no
// intersections 2 - there were intersections, and the first and last segments
// should be rejoined.
function clipLine(stream) {
var point0, // previous point
c0, // code for previous point
v0, // visibility of previous point
v00, // visibility of first point
clean; // no intersections
return {
lineStart: function() {
v00 = v0 = false;
clean = 1;
},
point: function(lambda, phi) {
var point1 = [lambda, phi],
point2,
v = visible(lambda, phi),
c = smallRadius
? v ? 0 : code(lambda, phi)
: v ? code(lambda + (lambda < 0 ? pi$3 : -pi$3), phi) : 0;
if (!point0 && (v00 = v0 = v)) stream.lineStart();
// Handle degeneracies.
// TODO ignore if not clipping polygons.
if (v !== v0) {
point2 = intersect(point0, point1);
if (!point2 || pointEqual(point0, point2) || pointEqual(point1, point2)) {
point1[0] += epsilon$2;
point1[1] += epsilon$2;
v = visible(point1[0], point1[1]);
}
}
if (v !== v0) {
clean = 0;
if (v) {
// outside going in
stream.lineStart();
point2 = intersect(point1, point0);
stream.point(point2[0], point2[1]);
} else {
// inside going out
point2 = intersect(point0, point1);
stream.point(point2[0], point2[1]);
stream.lineEnd();
}
point0 = point2;
} else if (notHemisphere && point0 && smallRadius ^ v) {
var t;
// If the codes for two points are different, or are both zero,
// and there this segment intersects with the small circle.
if (!(c & c0) && (t = intersect(point1, point0, true))) {
clean = 0;
if (smallRadius) {
stream.lineStart();
stream.point(t[0][0], t[0][1]);
stream.point(t[1][0], t[1][1]);
stream.lineEnd();
} else {
stream.point(t[1][0], t[1][1]);
stream.lineEnd();
stream.lineStart();
stream.point(t[0][0], t[0][1]);
}
}
}
if (v && (!point0 || !pointEqual(point0, point1))) {
stream.point(point1[0], point1[1]);
}
point0 = point1, v0 = v, c0 = c;
},
lineEnd: function() {
if (v0) stream.lineEnd();
point0 = null;
},
// Rejoin first and last segments if there were intersections and the first
// and last points were visible.
clean: function() {
return clean | ((v00 && v0) << 1);
}
};
}
// Intersects the great circle between a and b with the clip circle.
function intersect(a, b, two) {
var pa = cartesian(a),
pb = cartesian(b);
// We have two planes, n1.p = d1 and n2.p = d2.
// Find intersection line p(t) = c1 n1 + c2 n2 + t (n1 ⨯ n2).
var n1 = [1, 0, 0], // normal
n2 = cartesianCross(pa, pb),
n2n2 = cartesianDot(n2, n2),
n1n2 = n2[0], // cartesianDot(n1, n2),
determinant = n2n2 - n1n2 * n1n2;
// Two polar points.
if (!determinant) return !two && a;
var c1 = cr * n2n2 / determinant,
c2 = -cr * n1n2 / determinant,
n1xn2 = cartesianCross(n1, n2),
A = cartesianScale(n1, c1),
B = cartesianScale(n2, c2);
cartesianAddInPlace(A, B);
// Solve |p(t)|^2 = 1.
var u = n1xn2,
w = cartesianDot(A, u),
uu = cartesianDot(u, u),
t2 = w * w - uu * (cartesianDot(A, A) - 1);
if (t2 < 0) return;
var t = sqrt(t2),
q = cartesianScale(u, (-w - t) / uu);
cartesianAddInPlace(q, A);
q = spherical(q);
if (!two) return q;
// Two intersection points.
var lambda0 = a[0],
lambda1 = b[0],
phi0 = a[1],
phi1 = b[1],
z;
if (lambda1 < lambda0) z = lambda0, lambda0 = lambda1, lambda1 = z;
var delta = lambda1 - lambda0,
polar = abs(delta - pi$3) < epsilon$2,
meridian = polar || delta < epsilon$2;
if (!polar && phi1 < phi0) z = phi0, phi0 = phi1, phi1 = z;
// Check that the first point is between a and b.
if (meridian
? polar
? phi0 + phi1 > 0 ^ q[1] < (abs(q[0] - lambda0) < epsilon$2 ? phi0 : phi1)
: phi0 <= q[1] && q[1] <= phi1
: delta > pi$3 ^ (lambda0 <= q[0] && q[0] <= lambda1)) {
var q1 = cartesianScale(u, (-w + t) / uu);
cartesianAddInPlace(q1, A);
return [q, spherical(q1)];
}
}
// Generates a 4-bit vector representing the location of a point relative to
// the small circle's bounding box.
function code(lambda, phi) {
var r = smallRadius ? radius : pi$3 - radius,
code = 0;
if (lambda < -r) code |= 1; // left
else if (lambda > r) code |= 2; // right
if (phi < -r) code |= 4; // below
else if (phi > r) code |= 8; // above
return code;
}
return clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-pi$3, radius - pi$3]);
};
var transform = function(methods) {
return {
stream: transformer(methods)
};
};
function transformer(methods) {
return function(stream) {
var s = new TransformStream;
for (var key in methods) s[key] = methods[key];
s.stream = stream;
return s;
};
}
function TransformStream() {}
TransformStream.prototype = {
constructor: TransformStream,
point: function(x, y) { this.stream.point(x, y); },
sphere: function() { this.stream.sphere(); },
lineStart: function() { this.stream.lineStart(); },
lineEnd: function() { this.stream.lineEnd(); },
polygonStart: function() { this.stream.polygonStart(); },
polygonEnd: function() { this.stream.polygonEnd(); }
};
function fitExtent(projection, extent, object) {
var w = extent[1][0] - extent[0][0],
h = extent[1][1] - extent[0][1],
clip = projection.clipExtent && projection.clipExtent();
projection
.scale(150)
.translate([0, 0]);
if (clip != null) projection.clipExtent(null);
geoStream(object, projection.stream(boundsStream$1));
var b = boundsStream$1.result(),
k = Math.min(w / (b[1][0] - b[0][0]), h / (b[1][1] - b[0][1])),
x = +extent[0][0] + (w - k * (b[1][0] + b[0][0])) / 2,
y = +extent[0][1] + (h - k * (b[1][1] + b[0][1])) / 2;
if (clip != null) projection.clipExtent(clip);
return projection
.scale(k * 150)
.translate([x, y]);
}
function fitSize(projection, size, object) {
return fitExtent(projection, [[0, 0], size], object);
}
var maxDepth = 16;
var cosMinDistance = cos$1(30 * radians); // cos(minimum angular distance)
var resample = function(project, delta2) {
return +delta2 ? resample$1(project, delta2) : resampleNone(project);
};
function resampleNone(project) {
return transformer({
point: function(x, y) {
x = project(x, y);
this.stream.point(x[0], x[1]);
}
});
}
function resample$1(project, delta2) {
function resampleLineTo(x0, y0, lambda0, a0, b0, c0, x1, y1, lambda1, a1, b1, c1, depth, stream) {
var dx = x1 - x0,
dy = y1 - y0,
d2 = dx * dx + dy * dy;
if (d2 > 4 * delta2 && depth--) {
var a = a0 + a1,
b = b0 + b1,
c = c0 + c1,
m = sqrt(a * a + b * b + c * c),
phi2 = asin(c /= m),
lambda2 = abs(abs(c) - 1) < epsilon$2 || abs(lambda0 - lambda1) < epsilon$2 ? (lambda0 + lambda1) / 2 : atan2(b, a),
p = project(lambda2, phi2),
x2 = p[0],
y2 = p[1],
dx2 = x2 - x0,
dy2 = y2 - y0,
dz = dy * dx2 - dx * dy2;
if (dz * dz / d2 > delta2 // perpendicular projected distance
|| abs((dx * dx2 + dy * dy2) / d2 - 0.5) > 0.3 // midpoint close to an end
|| a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) { // angular distance
resampleLineTo(x0, y0, lambda0, a0, b0, c0, x2, y2, lambda2, a /= m, b /= m, c, depth, stream);
stream.point(x2, y2);
resampleLineTo(x2, y2, lambda2, a, b, c, x1, y1, lambda1, a1, b1, c1, depth, stream);
}
}
}
return function(stream) {
var lambda00, x00, y00, a00, b00, c00, // first point
lambda0, x0, y0, a0, b0, c0; // previous point
var resampleStream = {
point: point,
lineStart: lineStart,
lineEnd: lineEnd,
polygonStart: function() { stream.polygonStart(); resampleStream.lineStart = ringStart; },
polygonEnd: function() { stream.polygonEnd(); resampleStream.lineStart = lineStart; }
};
function point(x, y) {
x = project(x, y);
stream.point(x[0], x[1]);
}
function lineStart() {
x0 = NaN;
resampleStream.point = linePoint;
stream.lineStart();
}
function linePoint(lambda, phi) {
var c = cartesian([lambda, phi]), p = project(lambda, phi);
resampleLineTo(x0, y0, lambda0, a0, b0, c0, x0 = p[0], y0 = p[1], lambda0 = lambda, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream);
stream.point(x0, y0);
}
function lineEnd() {
resampleStream.point = point;
stream.lineEnd();
}
function ringStart() {
lineStart();
resampleStream.point = ringPoint;
resampleStream.lineEnd = ringEnd;
}
function ringPoint(lambda, phi) {
linePoint(lambda00 = lambda, phi), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;
resampleStream.point = linePoint;
}
function ringEnd() {
resampleLineTo(x0, y0, lambda0, a0, b0, c0, x00, y00, lambda00, a00, b00, c00, maxDepth, stream);
resampleStream.lineEnd = lineEnd;
lineEnd();
}
return resampleStream;
};
}
var transformRadians = transformer({
point: function(x, y) {
this.stream.point(x * radians, y * radians);
}
});
function projection(project) {
return projectionMutator(function() { return project; })();
}
function projectionMutator(projectAt) {
var project,
k = 150, // scale
x = 480, y = 250, // translate
dx, dy, lambda = 0, phi = 0, // center
deltaLambda = 0, deltaPhi = 0, deltaGamma = 0, rotate, projectRotate, // rotate
theta = null, preclip = clipAntimeridian, // clip angle
x0 = null, y0, x1, y1, postclip = identity$4, // clip extent
delta2 = 0.5, projectResample = resample(projectTransform, delta2), // precision
cache,
cacheStream;
function projection(point) {
point = projectRotate(point[0] * radians, point[1] * radians);
return [point[0] * k + dx, dy - point[1] * k];
}
function invert(point) {
point = projectRotate.invert((point[0] - dx) / k, (dy - point[1]) / k);
return point && [point[0] * degrees$1, point[1] * degrees$1];
}
function projectTransform(x, y) {
return x = project(x, y), [x[0] * k + dx, dy - x[1] * k];
}
projection.stream = function(stream) {
return cache && cacheStream === stream ? cache : cache = transformRadians(preclip(rotate, projectResample(postclip(cacheStream = stream))));
};
projection.clipAngle = function(_) {
return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians, 6 * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees$1;
};
projection.clipExtent = function(_) {
return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipExtent(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
};
projection.scale = function(_) {
return arguments.length ? (k = +_, recenter()) : k;
};
projection.translate = function(_) {
return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y];
};
projection.center = function(_) {
return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees$1, phi * degrees$1];
};
projection.rotate = function(_) {
return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees$1, deltaPhi * degrees$1, deltaGamma * degrees$1];
};
projection.precision = function(_) {
return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt(delta2);
};
projection.fitExtent = function(extent, object) {
return fitExtent(projection, extent, object);
};
projection.fitSize = function(size, object) {
return fitSize(projection, size, object);
};
function recenter() {
projectRotate = compose(rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma), project);
var center = project(lambda, phi);
dx = x - center[0] * k;
dy = y + center[1] * k;
return reset();
}
function reset() {
cache = cacheStream = null;
return projection;
}
return function() {
project = projectAt.apply(this, arguments);
projection.invert = project.invert && invert;
return recenter();
};
}
function conicProjection(projectAt) {
var phi0 = 0,
phi1 = pi$3 / 3,
m = projectionMutator(projectAt),
p = m(phi0, phi1);
p.parallels = function(_) {
return arguments.length ? m(phi0 = _[0] * radians, phi1 = _[1] * radians) : [phi0 * degrees$1, phi1 * degrees$1];
};
return p;
}
function cylindricalEqualAreaRaw(phi0) {
var cosPhi0 = cos$1(phi0);
function forward(lambda, phi) {
return [lambda * cosPhi0, sin$1(phi) / cosPhi0];
}
forward.invert = function(x, y) {
return [x / cosPhi0, asin(y * cosPhi0)];
};
return forward;
}
function conicEqualAreaRaw(y0, y1) {
var sy0 = sin$1(y0), n = (sy0 + sin$1(y1)) / 2;
// Are the parallels symmetrical around the Equator?
if (abs(n) < epsilon$2) return cylindricalEqualAreaRaw(y0);
var c = 1 + sy0 * (2 * n - sy0), r0 = sqrt(c) / n;
function project(x, y) {
var r = sqrt(c - 2 * n * sin$1(y)) / n;
return [r * sin$1(x *= n), r0 - r * cos$1(x)];
}
project.invert = function(x, y) {
var r0y = r0 - y;
return [atan2(x, abs(r0y)) / n * sign(r0y), asin((c - (x * x + r0y * r0y) * n * n) / (2 * n))];
};
return project;
}
var conicEqualArea = function() {
return conicProjection(conicEqualAreaRaw)
.scale(155.424)
.center([0, 33.6442]);
};
var albers = function() {
return conicEqualArea()
.parallels([29.5, 45.5])
.scale(1070)
.translate([480, 250])
.rotate([96, 0])
.center([-0.6, 38.7]);
};
// The projections must have mutually exclusive clip regions on the sphere,
// as this will avoid emitting interleaving lines and polygons.
function multiplex(streams) {
var n = streams.length;
return {
point: function(x, y) { var i = -1; while (++i < n) streams[i].point(x, y); },
sphere: function() { var i = -1; while (++i < n) streams[i].sphere(); },
lineStart: function() { var i = -1; while (++i < n) streams[i].lineStart(); },
lineEnd: function() { var i = -1; while (++i < n) streams[i].lineEnd(); },
polygonStart: function() { var i = -1; while (++i < n) streams[i].polygonStart(); },
polygonEnd: function() { var i = -1; while (++i < n) streams[i].polygonEnd(); }
};
}
// A composite projection for the United States, configured by default for
// 960×500. The projection also works quite well at 960×600 if you change the
// scale to 1285 and adjust the translate accordingly. The set of standard
// parallels for each region comes from USGS, which is published here:
// http://egsc.usgs.gov/isb/pubs/MapProjections/projections.html#albers
var albersUsa = function() {
var cache,
cacheStream,
lower48 = albers(), lower48Point,
alaska = conicEqualArea().rotate([154, 0]).center([-2, 58.5]).parallels([55, 65]), alaskaPoint, // EPSG:3338
hawaii = conicEqualArea().rotate([157, 0]).center([-3, 19.9]).parallels([8, 18]), hawaiiPoint, // ESRI:102007
point, pointStream = {point: function(x, y) { point = [x, y]; }};
function albersUsa(coordinates) {
var x = coordinates[0], y = coordinates[1];
return point = null,
(lower48Point.point(x, y), point)
|| (alaskaPoint.point(x, y), point)
|| (hawaiiPoint.point(x, y), point);
}
albersUsa.invert = function(coordinates) {
var k = lower48.scale(),
t = lower48.translate(),
x = (coordinates[0] - t[0]) / k,
y = (coordinates[1] - t[1]) / k;
return (y >= 0.120 && y < 0.234 && x >= -0.425 && x < -0.214 ? alaska
: y >= 0.166 && y < 0.234 && x >= -0.214 && x < -0.115 ? hawaii
: lower48).invert(coordinates);
};
albersUsa.stream = function(stream) {
return cache && cacheStream === stream ? cache : cache = multiplex([lower48.stream(cacheStream = stream), alaska.stream(stream), hawaii.stream(stream)]);
};
albersUsa.precision = function(_) {
if (!arguments.length) return lower48.precision();
lower48.precision(_), alaska.precision(_), hawaii.precision(_);
return reset();
};
albersUsa.scale = function(_) {
if (!arguments.length) return lower48.scale();
lower48.scale(_), alaska.scale(_ * 0.35), hawaii.scale(_);
return albersUsa.translate(lower48.translate());
};
albersUsa.translate = function(_) {
if (!arguments.length) return lower48.translate();
var k = lower48.scale(), x = +_[0], y = +_[1];
lower48Point = lower48
.translate(_)
.clipExtent([[x - 0.455 * k, y - 0.238 * k], [x + 0.455 * k, y + 0.238 * k]])
.stream(pointStream);
alaskaPoint = alaska
.translate([x - 0.307 * k, y + 0.201 * k])
.clipExtent([[x - 0.425 * k + epsilon$2, y + 0.120 * k + epsilon$2], [x - 0.214 * k - epsilon$2, y + 0.234 * k - epsilon$2]])
.stream(pointStream);
hawaiiPoint = hawaii
.translate([x - 0.205 * k, y + 0.212 * k])
.clipExtent([[x - 0.214 * k + epsilon$2, y + 0.166 * k + epsilon$2], [x - 0.115 * k - epsilon$2, y + 0.234 * k - epsilon$2]])
.stream(pointStream);
return reset();
};
albersUsa.fitExtent = function(extent, object) {
return fitExtent(albersUsa, extent, object);
};
albersUsa.fitSize = function(size, object) {
return fitSize(albersUsa, size, object);
};
function reset() {
cache = cacheStream = null;
return albersUsa;
}
return albersUsa.scale(1070);
};
function azimuthalRaw(scale) {
return function(x, y) {
var cx = cos$1(x),
cy = cos$1(y),
k = scale(cx * cy);
return [
k * cy * sin$1(x),
k * sin$1(y)
];
}
}
function azimuthalInvert(angle) {
return function(x, y) {
var z = sqrt(x * x + y * y),
c = angle(z),
sc = sin$1(c),
cc = cos$1(c);
return [
atan2(x * sc, z * cc),
asin(z && y * sc / z)
];
}
}
var azimuthalEqualAreaRaw = azimuthalRaw(function(cxcy) {
return sqrt(2 / (1 + cxcy));
});
azimuthalEqualAreaRaw.invert = azimuthalInvert(function(z) {
return 2 * asin(z / 2);
});
var azimuthalEqualArea = function() {
return projection(azimuthalEqualAreaRaw)
.scale(124.75)
.clipAngle(180 - 1e-3);
};
var azimuthalEquidistantRaw = azimuthalRaw(function(c) {
return (c = acos(c)) && c / sin$1(c);
});
azimuthalEquidistantRaw.invert = azimuthalInvert(function(z) {
return z;
});
var azimuthalEquidistant = function() {
return projection(azimuthalEquidistantRaw)
.scale(79.4188)
.clipAngle(180 - 1e-3);
};
function mercatorRaw(lambda, phi) {
return [lambda, log(tan((halfPi$2 + phi) / 2))];
}
mercatorRaw.invert = function(x, y) {
return [x, 2 * atan(exp(y)) - halfPi$2];
};
var mercator = function() {
return mercatorProjection(mercatorRaw)
.scale(961 / tau$3);
};
function mercatorProjection(project) {
var m = projection(project),
center = m.center,
scale = m.scale,
translate = m.translate,
clipExtent = m.clipExtent,
x0 = null, y0, x1, y1; // clip extent
m.scale = function(_) {
return arguments.length ? (scale(_), reclip()) : scale();
};
m.translate = function(_) {
return arguments.length ? (translate(_), reclip()) : translate();
};
m.center = function(_) {
return arguments.length ? (center(_), reclip()) : center();
};
m.clipExtent = function(_) {
return arguments.length ? ((_ == null ? x0 = y0 = x1 = y1 = null : (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1])), reclip()) : x0 == null ? null : [[x0, y0], [x1, y1]];
};
function reclip() {
var k = pi$3 * scale(),
t = m(rotation(m.rotate()).invert([0, 0]));
return clipExtent(x0 == null
? [[t[0] - k, t[1] - k], [t[0] + k, t[1] + k]] : project === mercatorRaw
? [[Math.max(t[0] - k, x0), y0], [Math.min(t[0] + k, x1), y1]]
: [[x0, Math.max(t[1] - k, y0)], [x1, Math.min(t[1] + k, y1)]]);
}
return reclip();
}
function tany(y) {
return tan((halfPi$2 + y) / 2);
}
function conicConformalRaw(y0, y1) {
var cy0 = cos$1(y0),
n = y0 === y1 ? sin$1(y0) : log(cy0 / cos$1(y1)) / log(tany(y1) / tany(y0)),
f = cy0 * pow(tany(y0), n) / n;
if (!n) return mercatorRaw;
function project(x, y) {
if (f > 0) { if (y < -halfPi$2 + epsilon$2) y = -halfPi$2 + epsilon$2; }
else { if (y > halfPi$2 - epsilon$2) y = halfPi$2 - epsilon$2; }
var r = f / pow(tany(y), n);
return [r * sin$1(n * x), f - r * cos$1(n * x)];
}
project.invert = function(x, y) {
var fy = f - y, r = sign(n) * sqrt(x * x + fy * fy);
return [atan2(x, abs(fy)) / n * sign(fy), 2 * atan(pow(f / r, 1 / n)) - halfPi$2];
};
return project;
}
var conicConformal = function() {
return conicProjection(conicConformalRaw)
.scale(109.5)
.parallels([30, 30]);
};
function equirectangularRaw(lambda, phi) {
return [lambda, phi];
}
equirectangularRaw.invert = equirectangularRaw;
var equirectangular = function() {
return projection(equirectangularRaw)
.scale(152.63);
};
function conicEquidistantRaw(y0, y1) {
var cy0 = cos$1(y0),
n = y0 === y1 ? sin$1(y0) : (cy0 - cos$1(y1)) / (y1 - y0),
g = cy0 / n + y0;
if (abs(n) < epsilon$2) return equirectangularRaw;
function project(x, y) {
var gy = g - y, nx = n * x;
return [gy * sin$1(nx), g - gy * cos$1(nx)];
}
project.invert = function(x, y) {
var gy = g - y;
return [atan2(x, abs(gy)) / n * sign(gy), g - sign(n) * sqrt(x * x + gy * gy)];
};
return project;
}
var conicEquidistant = function() {
return conicProjection(conicEquidistantRaw)
.scale(131.154)
.center([0, 13.9389]);
};
function gnomonicRaw(x, y) {
var cy = cos$1(y), k = cos$1(x) * cy;
return [cy * sin$1(x) / k, sin$1(y) / k];
}
gnomonicRaw.invert = azimuthalInvert(atan);
var gnomonic = function() {
return projection(gnomonicRaw)
.scale(144.049)
.clipAngle(60);
};
function scaleTranslate(kx, ky, tx, ty) {
return kx === 1 && ky === 1 && tx === 0 && ty === 0 ? identity$4 : transformer({
point: function(x, y) {
this.stream.point(x * kx + tx, y * ky + ty);
}
});
}
var identity$5 = function() {
var k = 1, tx = 0, ty = 0, sx = 1, sy = 1, transform = identity$4, // scale, translate and reflect
x0 = null, y0, x1, y1, clip = identity$4, // clip extent
cache,
cacheStream,
projection;
function reset() {
cache = cacheStream = null;
return projection;
}
return projection = {
stream: function(stream) {
return cache && cacheStream === stream ? cache : cache = transform(clip(cacheStream = stream));
},
clipExtent: function(_) {
return arguments.length ? (clip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipExtent(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
},
scale: function(_) {
return arguments.length ? (transform = scaleTranslate((k = +_) * sx, k * sy, tx, ty), reset()) : k;
},
translate: function(_) {
return arguments.length ? (transform = scaleTranslate(k * sx, k * sy, tx = +_[0], ty = +_[1]), reset()) : [tx, ty];
},
reflectX: function(_) {
return arguments.length ? (transform = scaleTranslate(k * (sx = _ ? -1 : 1), k * sy, tx, ty), reset()) : sx < 0;
},
reflectY: function(_) {
return arguments.length ? (transform = scaleTranslate(k * sx, k * (sy = _ ? -1 : 1), tx, ty), reset()) : sy < 0;
},
fitExtent: function(extent, object) {
return fitExtent(projection, extent, object);
},
fitSize: function(size, object) {
return fitSize(projection, size, object);
}
};
};
function orthographicRaw(x, y) {
return [cos$1(y) * sin$1(x), sin$1(y)];
}
orthographicRaw.invert = azimuthalInvert(asin);
var orthographic = function() {
return projection(orthographicRaw)
.scale(249.5)
.clipAngle(90 + epsilon$2);
};
function stereographicRaw(x, y) {
var cy = cos$1(y), k = 1 + cos$1(x) * cy;
return [cy * sin$1(x) / k, sin$1(y) / k];
}
stereographicRaw.invert = azimuthalInvert(function(z) {
return 2 * atan(z);
});
var stereographic = function() {
return projection(stereographicRaw)
.scale(250)
.clipAngle(142);
};
function transverseMercatorRaw(lambda, phi) {
return [log(tan((halfPi$2 + phi) / 2)), -lambda];
}
transverseMercatorRaw.invert = function(x, y) {
return [-y, 2 * atan(exp(x)) - halfPi$2];
};
var transverseMercator = function() {
var m = mercatorProjection(transverseMercatorRaw),
center = m.center,
rotate = m.rotate;
m.center = function(_) {
return arguments.length ? center([-_[1], _[0]]) : (_ = center(), [_[1], -_[0]]);
};
m.rotate = function(_) {
return arguments.length ? rotate([_[0], _[1], _.length > 2 ? _[2] + 90 : 90]) : (_ = rotate(), [_[0], _[1], _[2] - 90]);
};
return rotate([0, 0, 90])
.scale(159.155);
};
function defaultSeparation(a, b) {
return a.parent === b.parent ? 1 : 2;
}
function meanX(children) {
return children.reduce(meanXReduce, 0) / children.length;
}
function meanXReduce(x, c) {
return x + c.x;
}
function maxY(children) {
return 1 + children.reduce(maxYReduce, 0);
}
function maxYReduce(y, c) {
return Math.max(y, c.y);
}
function leafLeft(node) {
var children;
while (children = node.children) node = children[0];
return node;
}
function leafRight(node) {
var children;
while (children = node.children) node = children[children.length - 1];
return node;
}
var cluster = function() {
var separation = defaultSeparation,
dx = 1,
dy = 1,
nodeSize = false;
function cluster(root) {
var previousNode,
x = 0;
// First walk, computing the initial x & y values.
root.eachAfter(function(node) {
var children = node.children;
if (children) {
node.x = meanX(children);
node.y = maxY(children);
} else {
node.x = previousNode ? x += separation(node, previousNode) : 0;
node.y = 0;
previousNode = node;
}
});
var left = leafLeft(root),
right = leafRight(root),
x0 = left.x - separation(left, right) / 2,
x1 = right.x + separation(right, left) / 2;
// Second walk, normalizing x & y to the desired size.
return root.eachAfter(nodeSize ? function(node) {
node.x = (node.x - root.x) * dx;
node.y = (root.y - node.y) * dy;
} : function(node) {
node.x = (node.x - x0) / (x1 - x0) * dx;
node.y = (1 - (root.y ? node.y / root.y : 1)) * dy;
});
}
cluster.separation = function(x) {
return arguments.length ? (separation = x, cluster) : separation;
};
cluster.size = function(x) {
return arguments.length ? (nodeSize = false, dx = +x[0], dy = +x[1], cluster) : (nodeSize ? null : [dx, dy]);
};
cluster.nodeSize = function(x) {
return arguments.length ? (nodeSize = true, dx = +x[0], dy = +x[1], cluster) : (nodeSize ? [dx, dy] : null);
};
return cluster;
};
function count(node) {
var sum = 0,
children = node.children,
i = children && children.length;
if (!i) sum = 1;
else while (--i >= 0) sum += children[i].value;
node.value = sum;
}
var node_count = function() {
return this.eachAfter(count);
};
var node_each = function(callback) {
var node = this, current, next = [node], children, i, n;
do {
current = next.reverse(), next = [];
while (node = current.pop()) {
callback(node), children = node.children;
if (children) for (i = 0, n = children.length; i < n; ++i) {
next.push(children[i]);
}
}
} while (next.length);
return this;
};
var node_eachBefore = function(callback) {
var node = this, nodes = [node], children, i;
while (node = nodes.pop()) {
callback(node), children = node.children;
if (children) for (i = children.length - 1; i >= 0; --i) {
nodes.push(children[i]);
}
}
return this;
};
var node_eachAfter = function(callback) {
var node = this, nodes = [node], next = [], children, i, n;
while (node = nodes.pop()) {
next.push(node), children = node.children;
if (children) for (i = 0, n = children.length; i < n; ++i) {
nodes.push(children[i]);
}
}
while (node = next.pop()) {
callback(node);
}
return this;
};
var node_sum = function(value) {
return this.eachAfter(function(node) {
var sum = +value(node.data) || 0,
children = node.children,
i = children && children.length;
while (--i >= 0) sum += children[i].value;
node.value = sum;
});
};
var node_sort = function(compare) {
return this.eachBefore(function(node) {
if (node.children) {
node.children.sort(compare);
}
});
};
var node_path = function(end) {
var start = this,
ancestor = leastCommonAncestor(start, end),
nodes = [start];
while (start !== ancestor) {
start = start.parent;
nodes.push(start);
}
var k = nodes.length;
while (end !== ancestor) {
nodes.splice(k, 0, end);
end = end.parent;
}
return nodes;
};
function leastCommonAncestor(a, b) {
if (a === b) return a;
var aNodes = a.ancestors(),
bNodes = b.ancestors(),
c = null;
a = aNodes.pop();
b = bNodes.pop();
while (a === b) {
c = a;
a = aNodes.pop();
b = bNodes.pop();
}
return c;
}
var node_ancestors = function() {
var node = this, nodes = [node];
while (node = node.parent) {
nodes.push(node);
}
return nodes;
};
var node_descendants = function() {
var nodes = [];
this.each(function(node) {
nodes.push(node);
});
return nodes;
};
var node_leaves = function() {
var leaves = [];
this.eachBefore(function(node) {
if (!node.children) {
leaves.push(node);
}
});
return leaves;
};
var node_links = function() {
var root = this, links = [];
root.each(function(node) {
if (node !== root) { // Don’t include the root’s parent, if any.
links.push({source: node.parent, target: node});
}
});
return links;
};
function hierarchy(data, children) {
var root = new Node(data),
valued = +data.value && (root.value = data.value),
node,
nodes = [root],
child,
childs,
i,
n;
if (children == null) children = defaultChildren;
while (node = nodes.pop()) {
if (valued) node.value = +node.data.value;
if ((childs = children(node.data)) && (n = childs.length)) {
node.children = new Array(n);
for (i = n - 1; i >= 0; --i) {
nodes.push(child = node.children[i] = new Node(childs[i]));
child.parent = node;
child.depth = node.depth + 1;
}
}
}
return root.eachBefore(computeHeight);
}
function node_copy() {
return hierarchy(this).eachBefore(copyData);
}
function defaultChildren(d) {
return d.children;
}
function copyData(node) {
node.data = node.data.data;
}
function computeHeight(node) {
var height = 0;
do node.height = height;
while ((node = node.parent) && (node.height < ++height));
}
function Node(data) {
this.data = data;
this.depth =
this.height = 0;
this.parent = null;
}
Node.prototype = hierarchy.prototype = {
constructor: Node,
count: node_count,
each: node_each,
eachAfter: node_eachAfter,
eachBefore: node_eachBefore,
sum: node_sum,
sort: node_sort,
path: node_path,
ancestors: node_ancestors,
descendants: node_descendants,
leaves: node_leaves,
links: node_links,
copy: node_copy
};
function Node$2(value) {
this._ = value;
this.next = null;
}
var shuffle$1 = function(array) {
var i,
n = (array = array.slice()).length,
head = null,
node = head;
while (n) {
var next = new Node$2(array[n - 1]);
if (node) node = node.next = next;
else node = head = next;
array[i] = array[--n];
}
return {
head: head,
tail: node
};
};
var enclose = function(circles) {
return encloseN(shuffle$1(circles), []);
};
function encloses(a, b) {
var dx = b.x - a.x,
dy = b.y - a.y,
dr = a.r - b.r;
return dr * dr + 1e-6 > dx * dx + dy * dy;
}
// Returns the smallest circle that contains circles L and intersects circles B.
function encloseN(L, B) {
var circle,
l0 = null,
l1 = L.head,
l2,
p1;
switch (B.length) {
case 1: circle = enclose1(B[0]); break;
case 2: circle = enclose2(B[0], B[1]); break;
case 3: circle = enclose3(B[0], B[1], B[2]); break;
}
while (l1) {
p1 = l1._, l2 = l1.next;
if (!circle || !encloses(circle, p1)) {
// Temporarily truncate L before l1.
if (l0) L.tail = l0, l0.next = null;
else L.head = L.tail = null;
B.push(p1);
circle = encloseN(L, B); // Note: reorders L!
B.pop();
// Move l1 to the front of L and reconnect the truncated list L.
if (L.head) l1.next = L.head, L.head = l1;
else l1.next = null, L.head = L.tail = l1;
l0 = L.tail, l0.next = l2;
} else {
l0 = l1;
}
l1 = l2;
}
L.tail = l0;
return circle;
}
function enclose1(a) {
return {
x: a.x,
y: a.y,
r: a.r
};
}
function enclose2(a, b) {
var x1 = a.x, y1 = a.y, r1 = a.r,
x2 = b.x, y2 = b.y, r2 = b.r,
x21 = x2 - x1, y21 = y2 - y1, r21 = r2 - r1,
l = Math.sqrt(x21 * x21 + y21 * y21);
return {
x: (x1 + x2 + x21 / l * r21) / 2,
y: (y1 + y2 + y21 / l * r21) / 2,
r: (l + r1 + r2) / 2
};
}
function enclose3(a, b, c) {
var x1 = a.x, y1 = a.y, r1 = a.r,
x2 = b.x, y2 = b.y, r2 = b.r,
x3 = c.x, y3 = c.y, r3 = c.r,
a2 = 2 * (x1 - x2),
b2 = 2 * (y1 - y2),
c2 = 2 * (r2 - r1),
d2 = x1 * x1 + y1 * y1 - r1 * r1 - x2 * x2 - y2 * y2 + r2 * r2,
a3 = 2 * (x1 - x3),
b3 = 2 * (y1 - y3),
c3 = 2 * (r3 - r1),
d3 = x1 * x1 + y1 * y1 - r1 * r1 - x3 * x3 - y3 * y3 + r3 * r3,
ab = a3 * b2 - a2 * b3,
xa = (b2 * d3 - b3 * d2) / ab - x1,
xb = (b3 * c2 - b2 * c3) / ab,
ya = (a3 * d2 - a2 * d3) / ab - y1,
yb = (a2 * c3 - a3 * c2) / ab,
A = xb * xb + yb * yb - 1,
B = 2 * (xa * xb + ya * yb + r1),
C = xa * xa + ya * ya - r1 * r1,
r = (-B - Math.sqrt(B * B - 4 * A * C)) / (2 * A);
return {
x: xa + xb * r + x1,
y: ya + yb * r + y1,
r: r
};
}
function place(a, b, c) {
var ax = a.x,
ay = a.y,
da = b.r + c.r,
db = a.r + c.r,
dx = b.x - ax,
dy = b.y - ay,
dc = dx * dx + dy * dy;
if (dc) {
var x = 0.5 + ((db *= db) - (da *= da)) / (2 * dc),
y = Math.sqrt(Math.max(0, 2 * da * (db + dc) - (db -= dc) * db - da * da)) / (2 * dc);
c.x = ax + x * dx + y * dy;
c.y = ay + x * dy - y * dx;
} else {
c.x = ax + db;
c.y = ay;
}
}
function intersects(a, b) {
var dx = b.x - a.x,
dy = b.y - a.y,
dr = a.r + b.r;
return dr * dr - 1e-6 > dx * dx + dy * dy;
}
function distance2(node, x, y) {
var a = node._,
b = node.next._,
ab = a.r + b.r,
dx = (a.x * b.r + b.x * a.r) / ab - x,
dy = (a.y * b.r + b.y * a.r) / ab - y;
return dx * dx + dy * dy;
}
function Node$1(circle) {
this._ = circle;
this.next = null;
this.previous = null;
}
function packEnclose(circles) {
if (!(n = circles.length)) return 0;
var a, b, c, n;
// Place the first circle.
a = circles[0], a.x = 0, a.y = 0;
if (!(n > 1)) return a.r;
// Place the second circle.
b = circles[1], a.x = -b.r, b.x = a.r, b.y = 0;
if (!(n > 2)) return a.r + b.r;
// Place the third circle.
place(b, a, c = circles[2]);
// Initialize the weighted centroid.
var aa = a.r * a.r,
ba = b.r * b.r,
ca = c.r * c.r,
oa = aa + ba + ca,
ox = aa * a.x + ba * b.x + ca * c.x,
oy = aa * a.y + ba * b.y + ca * c.y,
cx, cy, i, j, k, sj, sk;
// Initialize the front-chain using the first three circles a, b and c.
a = new Node$1(a), b = new Node$1(b), c = new Node$1(c);
a.next = c.previous = b;
b.next = a.previous = c;
c.next = b.previous = a;
// Attempt to place each remaining circle…
pack: for (i = 3; i < n; ++i) {
place(a._, b._, c = circles[i]), c = new Node$1(c);
// Find the closest intersecting circle on the front-chain, if any.
// “Closeness” is determined by linear distance along the front-chain.
// “Ahead” or “behind” is likewise determined by linear distance.
j = b.next, k = a.previous, sj = b._.r, sk = a._.r;
do {
if (sj <= sk) {
if (intersects(j._, c._)) {
b = j, a.next = b, b.previous = a, --i;
continue pack;
}
sj += j._.r, j = j.next;
} else {
if (intersects(k._, c._)) {
a = k, a.next = b, b.previous = a, --i;
continue pack;
}
sk += k._.r, k = k.previous;
}
} while (j !== k.next);
// Success! Insert the new circle c between a and b.
c.previous = a, c.next = b, a.next = b.previous = b = c;
// Update the weighted centroid.
oa += ca = c._.r * c._.r;
ox += ca * c._.x;
oy += ca * c._.y;
// Compute the new closest circle pair to the centroid.
aa = distance2(a, cx = ox / oa, cy = oy / oa);
while ((c = c.next) !== b) {
if ((ca = distance2(c, cx, cy)) < aa) {
a = c, aa = ca;
}
}
b = a.next;
}
// Compute the enclosing circle of the front chain.
a = [b._], c = b; while ((c = c.next) !== b) a.push(c._); c = enclose(a);
// Translate the circles to put the enclosing circle around the origin.
for (i = 0; i < n; ++i) a = circles[i], a.x -= c.x, a.y -= c.y;
return c.r;
}
var siblings = function(circles) {
packEnclose(circles);
return circles;
};
function optional(f) {
return f == null ? null : required(f);
}
function required(f) {
if (typeof f !== "function") throw new Error;
return f;
}
function constantZero() {
return 0;
}
var constant$8 = function(x) {
return function() {
return x;
};
};
function defaultRadius$1(d) {
return Math.sqrt(d.value);
}
var index$2 = function() {
var radius = null,
dx = 1,
dy = 1,
padding = constantZero;
function pack(root) {
root.x = dx / 2, root.y = dy / 2;
if (radius) {
root.eachBefore(radiusLeaf(radius))
.eachAfter(packChildren(padding, 0.5))
.eachBefore(translateChild(1));
} else {
root.eachBefore(radiusLeaf(defaultRadius$1))
.eachAfter(packChildren(constantZero, 1))
.eachAfter(packChildren(padding, root.r / Math.min(dx, dy)))
.eachBefore(translateChild(Math.min(dx, dy) / (2 * root.r)));
}
return root;
}
pack.radius = function(x) {
return arguments.length ? (radius = optional(x), pack) : radius;
};
pack.size = function(x) {
return arguments.length ? (dx = +x[0], dy = +x[1], pack) : [dx, dy];
};
pack.padding = function(x) {
return arguments.length ? (padding = typeof x === "function" ? x : constant$8(+x), pack) : padding;
};
return pack;
};
function radiusLeaf(radius) {
return function(node) {
if (!node.children) {
node.r = Math.max(0, +radius(node) || 0);
}
};
}
function packChildren(padding, k) {
return function(node) {
if (children = node.children) {
var children,
i,
n = children.length,
r = padding(node) * k || 0,
e;
if (r) for (i = 0; i < n; ++i) children[i].r += r;
e = packEnclose(children);
if (r) for (i = 0; i < n; ++i) children[i].r -= r;
node.r = e + r;
}
};
}
function translateChild(k) {
return function(node) {
var parent = node.parent;
node.r *= k;
if (parent) {
node.x = parent.x + k * node.x;
node.y = parent.y + k * node.y;
}
};
}
var roundNode = function(node) {
node.x0 = Math.round(node.x0);
node.y0 = Math.round(node.y0);
node.x1 = Math.round(node.x1);
node.y1 = Math.round(node.y1);
};
var treemapDice = function(parent, x0, y0, x1, y1) {
var nodes = parent.children,
node,
i = -1,
n = nodes.length,
k = parent.value && (x1 - x0) / parent.value;
while (++i < n) {
node = nodes[i], node.y0 = y0, node.y1 = y1;
node.x0 = x0, node.x1 = x0 += node.value * k;
}
};
var partition = function() {
var dx = 1,
dy = 1,
padding = 0,
round = false;
function partition(root) {
var n = root.height + 1;
root.x0 =
root.y0 = padding;
root.x1 = dx;
root.y1 = dy / n;
root.eachBefore(positionNode(dy, n));
if (round) root.eachBefore(roundNode);
return root;
}
function positionNode(dy, n) {
return function(node) {
if (node.children) {
treemapDice(node, node.x0, dy * (node.depth + 1) / n, node.x1, dy * (node.depth + 2) / n);
}
var x0 = node.x0,
y0 = node.y0,
x1 = node.x1 - padding,
y1 = node.y1 - padding;
if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
node.x0 = x0;
node.y0 = y0;
node.x1 = x1;
node.y1 = y1;
};
}
partition.round = function(x) {
return arguments.length ? (round = !!x, partition) : round;
};
partition.size = function(x) {
return arguments.length ? (dx = +x[0], dy = +x[1], partition) : [dx, dy];
};
partition.padding = function(x) {
return arguments.length ? (padding = +x, partition) : padding;
};
return partition;
};
var keyPrefix$1 = "$";
var preroot = {depth: -1};
var ambiguous = {};
function defaultId(d) {
return d.id;
}
function defaultParentId(d) {
return d.parentId;
}
var stratify = function() {
var id = defaultId,
parentId = defaultParentId;
function stratify(data) {
var d,
i,
n = data.length,
root,
parent,
node,
nodes = new Array(n),
nodeId,
nodeKey,
nodeByKey = {};
for (i = 0; i < n; ++i) {
d = data[i], node = nodes[i] = new Node(d);
if ((nodeId = id(d, i, data)) != null && (nodeId += "")) {
nodeKey = keyPrefix$1 + (node.id = nodeId);
nodeByKey[nodeKey] = nodeKey in nodeByKey ? ambiguous : node;
}
}
for (i = 0; i < n; ++i) {
node = nodes[i], nodeId = parentId(data[i], i, data);
if (nodeId == null || !(nodeId += "")) {
if (root) throw new Error("multiple roots");
root = node;
} else {
parent = nodeByKey[keyPrefix$1 + nodeId];
if (!parent) throw new Error("missing: " + nodeId);
if (parent === ambiguous) throw new Error("ambiguous: " + nodeId);
if (parent.children) parent.children.push(node);
else parent.children = [node];
node.parent = parent;
}
}
if (!root) throw new Error("no root");
root.parent = preroot;
root.eachBefore(function(node) { node.depth = node.parent.depth + 1; --n; }).eachBefore(computeHeight);
root.parent = null;
if (n > 0) throw new Error("cycle");
return root;
}
stratify.id = function(x) {
return arguments.length ? (id = required(x), stratify) : id;
};
stratify.parentId = function(x) {
return arguments.length ? (parentId = required(x), stratify) : parentId;
};
return stratify;
};
function defaultSeparation$1(a, b) {
return a.parent === b.parent ? 1 : 2;
}
// function radialSeparation(a, b) {
// return (a.parent === b.parent ? 1 : 2) / a.depth;
// }
// This function is used to traverse the left contour of a subtree (or
// subforest). It returns the successor of v on this contour. This successor is
// either given by the leftmost child of v or by the thread of v. The function
// returns null if and only if v is on the highest level of its subtree.
function nextLeft(v) {
var children = v.children;
return children ? children[0] : v.t;
}
// This function works analogously to nextLeft.
function nextRight(v) {
var children = v.children;
return children ? children[children.length - 1] : v.t;
}
// Shifts the current subtree rooted at w+. This is done by increasing
// prelim(w+) and mod(w+) by shift.
function moveSubtree(wm, wp, shift) {
var change = shift / (wp.i - wm.i);
wp.c -= change;
wp.s += shift;
wm.c += change;
wp.z += shift;
wp.m += shift;
}
// All other shifts, applied to the smaller subtrees between w- and w+, are
// performed by this function. To prepare the shifts, we have to adjust
// change(w+), shift(w+), and change(w-).
function executeShifts(v) {
var shift = 0,
change = 0,
children = v.children,
i = children.length,
w;
while (--i >= 0) {
w = children[i];
w.z += shift;
w.m += shift;
shift += w.s + (change += w.c);
}
}
// If vi-’s ancestor is a sibling of v, returns vi-’s ancestor. Otherwise,
// returns the specified (default) ancestor.
function nextAncestor(vim, v, ancestor) {
return vim.a.parent === v.parent ? vim.a : ancestor;
}
function TreeNode(node, i) {
this._ = node;
this.parent = null;
this.children = null;
this.A = null; // default ancestor
this.a = this; // ancestor
this.z = 0; // prelim
this.m = 0; // mod
this.c = 0; // change
this.s = 0; // shift
this.t = null; // thread
this.i = i; // number
}
TreeNode.prototype = Object.create(Node.prototype);
function treeRoot(root) {
var tree = new TreeNode(root, 0),
node,
nodes = [tree],
child,
children,
i,
n;
while (node = nodes.pop()) {
if (children = node._.children) {
node.children = new Array(n = children.length);
for (i = n - 1; i >= 0; --i) {
nodes.push(child = node.children[i] = new TreeNode(children[i], i));
child.parent = node;
}
}
}
(tree.parent = new TreeNode(null, 0)).children = [tree];
return tree;
}
// Node-link tree diagram using the Reingold-Tilford "tidy" algorithm
var tree = function() {
var separation = defaultSeparation$1,
dx = 1,
dy = 1,
nodeSize = null;
function tree(root) {
var t = treeRoot(root);
// Compute the layout using Buchheim et al.’s algorithm.
t.eachAfter(firstWalk), t.parent.m = -t.z;
t.eachBefore(secondWalk);
// If a fixed node size is specified, scale x and y.
if (nodeSize) root.eachBefore(sizeNode);
// If a fixed tree size is specified, scale x and y based on the extent.
// Compute the left-most, right-most, and depth-most nodes for extents.
else {
var left = root,
right = root,
bottom = root;
root.eachBefore(function(node) {
if (node.x < left.x) left = node;
if (node.x > right.x) right = node;
if (node.depth > bottom.depth) bottom = node;
});
var s = left === right ? 1 : separation(left, right) / 2,
tx = s - left.x,
kx = dx / (right.x + s + tx),
ky = dy / (bottom.depth || 1);
root.eachBefore(function(node) {
node.x = (node.x + tx) * kx;
node.y = node.depth * ky;
});
}
return root;
}
// Computes a preliminary x-coordinate for v. Before that, FIRST WALK is
// applied recursively to the children of v, as well as the function
// APPORTION. After spacing out the children by calling EXECUTE SHIFTS, the
// node v is placed to the midpoint of its outermost children.
function firstWalk(v) {
var children = v.children,
siblings = v.parent.children,
w = v.i ? siblings[v.i - 1] : null;
if (children) {
executeShifts(v);
var midpoint = (children[0].z + children[children.length - 1].z) / 2;
if (w) {
v.z = w.z + separation(v._, w._);
v.m = v.z - midpoint;
} else {
v.z = midpoint;
}
} else if (w) {
v.z = w.z + separation(v._, w._);
}
v.parent.A = apportion(v, w, v.parent.A || siblings[0]);
}
// Computes all real x-coordinates by summing up the modifiers recursively.
function secondWalk(v) {
v._.x = v.z + v.parent.m;
v.m += v.parent.m;
}
// The core of the algorithm. Here, a new subtree is combined with the
// previous subtrees. Threads are used to traverse the inside and outside
// contours of the left and right subtree up to the highest common level. The
// vertices used for the traversals are vi+, vi-, vo-, and vo+, where the
// superscript o means outside and i means inside, the subscript - means left
// subtree and + means right subtree. For summing up the modifiers along the
// contour, we use respective variables si+, si-, so-, and so+. Whenever two
// nodes of the inside contours conflict, we compute the left one of the
// greatest uncommon ancestors using the function ANCESTOR and call MOVE
// SUBTREE to shift the subtree and prepare the shifts of smaller subtrees.
// Finally, we add a new thread (if necessary).
function apportion(v, w, ancestor) {
if (w) {
var vip = v,
vop = v,
vim = w,
vom = vip.parent.children[0],
sip = vip.m,
sop = vop.m,
sim = vim.m,
som = vom.m,
shift;
while (vim = nextRight(vim), vip = nextLeft(vip), vim && vip) {
vom = nextLeft(vom);
vop = nextRight(vop);
vop.a = v;
shift = vim.z + sim - vip.z - sip + separation(vim._, vip._);
if (shift > 0) {
moveSubtree(nextAncestor(vim, v, ancestor), v, shift);
sip += shift;
sop += shift;
}
sim += vim.m;
sip += vip.m;
som += vom.m;
sop += vop.m;
}
if (vim && !nextRight(vop)) {
vop.t = vim;
vop.m += sim - sop;
}
if (vip && !nextLeft(vom)) {
vom.t = vip;
vom.m += sip - som;
ancestor = v;
}
}
return ancestor;
}
function sizeNode(node) {
node.x *= dx;
node.y = node.depth * dy;
}
tree.separation = function(x) {
return arguments.length ? (separation = x, tree) : separation;
};
tree.size = function(x) {
return arguments.length ? (nodeSize = false, dx = +x[0], dy = +x[1], tree) : (nodeSize ? null : [dx, dy]);
};
tree.nodeSize = function(x) {
return arguments.length ? (nodeSize = true, dx = +x[0], dy = +x[1], tree) : (nodeSize ? [dx, dy] : null);
};
return tree;
};
var treemapSlice = function(parent, x0, y0, x1, y1) {
var nodes = parent.children,
node,
i = -1,
n = nodes.length,
k = parent.value && (y1 - y0) / parent.value;
while (++i < n) {
node = nodes[i], node.x0 = x0, node.x1 = x1;
node.y0 = y0, node.y1 = y0 += node.value * k;
}
};
var phi = (1 + Math.sqrt(5)) / 2;
function squarifyRatio(ratio, parent, x0, y0, x1, y1) {
var rows = [],
nodes = parent.children,
row,
nodeValue,
i0 = 0,
i1 = 0,
n = nodes.length,
dx, dy,
value = parent.value,
sumValue,
minValue,
maxValue,
newRatio,
minRatio,
alpha,
beta;
while (i0 < n) {
dx = x1 - x0, dy = y1 - y0;
// Find the next non-empty node.
do sumValue = nodes[i1++].value; while (!sumValue && i1 < n);
minValue = maxValue = sumValue;
alpha = Math.max(dy / dx, dx / dy) / (value * ratio);
beta = sumValue * sumValue * alpha;
minRatio = Math.max(maxValue / beta, beta / minValue);
// Keep adding nodes while the aspect ratio maintains or improves.
for (; i1 < n; ++i1) {
sumValue += nodeValue = nodes[i1].value;
if (nodeValue < minValue) minValue = nodeValue;
if (nodeValue > maxValue) maxValue = nodeValue;
beta = sumValue * sumValue * alpha;
newRatio = Math.max(maxValue / beta, beta / minValue);
if (newRatio > minRatio) { sumValue -= nodeValue; break; }
minRatio = newRatio;
}
// Position and record the row orientation.
rows.push(row = {value: sumValue, dice: dx < dy, children: nodes.slice(i0, i1)});
if (row.dice) treemapDice(row, x0, y0, x1, value ? y0 += dy * sumValue / value : y1);
else treemapSlice(row, x0, y0, value ? x0 += dx * sumValue / value : x1, y1);
value -= sumValue, i0 = i1;
}
return rows;
}
var squarify = ((function custom(ratio) {
function squarify(parent, x0, y0, x1, y1) {
squarifyRatio(ratio, parent, x0, y0, x1, y1);
}
squarify.ratio = function(x) {
return custom((x = +x) > 1 ? x : 1);
};
return squarify;
}))(phi);
var index$3 = function() {
var tile = squarify,
round = false,
dx = 1,
dy = 1,
paddingStack = [0],
paddingInner = constantZero,
paddingTop = constantZero,
paddingRight = constantZero,
paddingBottom = constantZero,
paddingLeft = constantZero;
function treemap(root) {
root.x0 =
root.y0 = 0;
root.x1 = dx;
root.y1 = dy;
root.eachBefore(positionNode);
paddingStack = [0];
if (round) root.eachBefore(roundNode);
return root;
}
function positionNode(node) {
var p = paddingStack[node.depth],
x0 = node.x0 + p,
y0 = node.y0 + p,
x1 = node.x1 - p,
y1 = node.y1 - p;
if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
node.x0 = x0;
node.y0 = y0;
node.x1 = x1;
node.y1 = y1;
if (node.children) {
p = paddingStack[node.depth + 1] = paddingInner(node) / 2;
x0 += paddingLeft(node) - p;
y0 += paddingTop(node) - p;
x1 -= paddingRight(node) - p;
y1 -= paddingBottom(node) - p;
if (x1 < x0) x0 = x1 = (x0 + x1) / 2;
if (y1 < y0) y0 = y1 = (y0 + y1) / 2;
tile(node, x0, y0, x1, y1);
}
}
treemap.round = function(x) {
return arguments.length ? (round = !!x, treemap) : round;
};
treemap.size = function(x) {
return arguments.length ? (dx = +x[0], dy = +x[1], treemap) : [dx, dy];
};
treemap.tile = function(x) {
return arguments.length ? (tile = required(x), treemap) : tile;
};
treemap.padding = function(x) {
return arguments.length ? treemap.paddingInner(x).paddingOuter(x) : treemap.paddingInner();
};
treemap.paddingInner = function(x) {
return arguments.length ? (paddingInner = typeof x === "function" ? x : constant$8(+x), treemap) : paddingInner;
};
treemap.paddingOuter = function(x) {
return arguments.length ? treemap.paddingTop(x).paddingRight(x).paddingBottom(x).paddingLeft(x) : treemap.paddingTop();
};
treemap.paddingTop = function(x) {
return arguments.length ? (paddingTop = typeof x === "function" ? x : constant$8(+x), treemap) : paddingTop;
};
treemap.paddingRight = function(x) {
return arguments.length ? (paddingRight = typeof x === "function" ? x : constant$8(+x), treemap) : paddingRight;
};
treemap.paddingBottom = function(x) {
return arguments.length ? (paddingBottom = typeof x === "function" ? x : constant$8(+x), treemap) : paddingBottom;
};
treemap.paddingLeft = function(x) {
return arguments.length ? (paddingLeft = typeof x === "function" ? x : constant$8(+x), treemap) : paddingLeft;
};
return treemap;
};
var binary = function(parent, x0, y0, x1, y1) {
var nodes = parent.children,
i, n = nodes.length,
sum, sums = new Array(n + 1);
for (sums[0] = sum = i = 0; i < n; ++i) {
sums[i + 1] = sum += nodes[i].value;
}
partition(0, n, parent.value, x0, y0, x1, y1);
function partition(i, j, value, x0, y0, x1, y1) {
if (i >= j - 1) {
var node = nodes[i];
node.x0 = x0, node.y0 = y0;
node.x1 = x1, node.y1 = y1;
return;
}
var valueOffset = sums[i],
valueTarget = (value / 2) + valueOffset,
k = i + 1,
hi = j - 1;
while (k < hi) {
var mid = k + hi >>> 1;
if (sums[mid] < valueTarget) k = mid + 1;
else hi = mid;
}
if ((valueTarget - sums[k - 1]) < (sums[k] - valueTarget) && i + 1 < k) --k;
var valueLeft = sums[k] - valueOffset,
valueRight = value - valueLeft;
if ((x1 - x0) > (y1 - y0)) {
var xk = (x0 * valueRight + x1 * valueLeft) / value;
partition(i, k, valueLeft, x0, y0, xk, y1);
partition(k, j, valueRight, xk, y0, x1, y1);
} else {
var yk = (y0 * valueRight + y1 * valueLeft) / value;
partition(i, k, valueLeft, x0, y0, x1, yk);
partition(k, j, valueRight, x0, yk, x1, y1);
}
}
};
var sliceDice = function(parent, x0, y0, x1, y1) {
(parent.depth & 1 ? treemapSlice : treemapDice)(parent, x0, y0, x1, y1);
};
var resquarify = ((function custom(ratio) {
function resquarify(parent, x0, y0, x1, y1) {
if ((rows = parent._squarify) && (rows.ratio === ratio)) {
var rows,
row,
nodes,
i,
j = -1,
n,
m = rows.length,
value = parent.value;
while (++j < m) {
row = rows[j], nodes = row.children;
for (i = row.value = 0, n = nodes.length; i < n; ++i) row.value += nodes[i].value;
if (row.dice) treemapDice(row, x0, y0, x1, y0 += (y1 - y0) * row.value / value);
else treemapSlice(row, x0, y0, x0 += (x1 - x0) * row.value / value, y1);
value -= row.value;
}
} else {
parent._squarify = rows = squarifyRatio(ratio, parent, x0, y0, x1, y1);
rows.ratio = ratio;
}
}
resquarify.ratio = function(x) {
return custom((x = +x) > 1 ? x : 1);
};
return resquarify;
}))(phi);
var area$1 = function(polygon) {
var i = -1,
n = polygon.length,
a,
b = polygon[n - 1],
area = 0;
while (++i < n) {
a = b;
b = polygon[i];
area += a[1] * b[0] - a[0] * b[1];
}
return area / 2;
};
var centroid$1 = function(polygon) {
var i = -1,
n = polygon.length,
x = 0,
y = 0,
a,
b = polygon[n - 1],
c,
k = 0;
while (++i < n) {
a = b;
b = polygon[i];
k += c = a[0] * b[1] - b[0] * a[1];
x += (a[0] + b[0]) * c;
y += (a[1] + b[1]) * c;
}
return k *= 3, [x / k, y / k];
};
// Returns the 2D cross product of AB and AC vectors, i.e., the z-component of
// the 3D cross product in a quadrant I Cartesian coordinate system (+x is
// right, +y is up). Returns a positive value if ABC is counter-clockwise,
// negative if clockwise, and zero if the points are collinear.
var cross$1 = function(a, b, c) {
return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);
};
function lexicographicOrder(a, b) {
return a[0] - b[0] || a[1] - b[1];
}
// Computes the upper convex hull per the monotone chain algorithm.
// Assumes points.length >= 3, is sorted by x, unique in y.
// Returns an array of indices into points in left-to-right order.
function computeUpperHullIndexes(points) {
var n = points.length,
indexes = [0, 1],
size = 2;
for (var i = 2; i < n; ++i) {
while (size > 1 && cross$1(points[indexes[size - 2]], points[indexes[size - 1]], points[i]) <= 0) --size;
indexes[size++] = i;
}
return indexes.slice(0, size); // remove popped points
}
var hull = function(points) {
if ((n = points.length) < 3) return null;
var i,
n,
sortedPoints = new Array(n),
flippedPoints = new Array(n);
for (i = 0; i < n; ++i) sortedPoints[i] = [+points[i][0], +points[i][1], i];
sortedPoints.sort(lexicographicOrder);
for (i = 0; i < n; ++i) flippedPoints[i] = [sortedPoints[i][0], -sortedPoints[i][1]];
var upperIndexes = computeUpperHullIndexes(sortedPoints),
lowerIndexes = computeUpperHullIndexes(flippedPoints);
// Construct the hull polygon, removing possible duplicate endpoints.
var skipLeft = lowerIndexes[0] === upperIndexes[0],
skipRight = lowerIndexes[lowerIndexes.length - 1] === upperIndexes[upperIndexes.length - 1],
hull = [];
// Add upper hull in right-to-l order.
// Then add lower hull in left-to-right order.
for (i = upperIndexes.length - 1; i >= 0; --i) hull.push(points[sortedPoints[upperIndexes[i]][2]]);
for (i = +skipLeft; i < lowerIndexes.length - skipRight; ++i) hull.push(points[sortedPoints[lowerIndexes[i]][2]]);
return hull;
};
var contains$1 = function(polygon, point) {
var n = polygon.length,
p = polygon[n - 1],
x = point[0], y = point[1],
x0 = p[0], y0 = p[1],
x1, y1,
inside = false;
for (var i = 0; i < n; ++i) {
p = polygon[i], x1 = p[0], y1 = p[1];
if (((y1 > y) !== (y0 > y)) && (x < (x0 - x1) * (y - y1) / (y0 - y1) + x1)) inside = !inside;
x0 = x1, y0 = y1;
}
return inside;
};
var length$2 = function(polygon) {
var i = -1,
n = polygon.length,
b = polygon[n - 1],
xa,
ya,
xb = b[0],
yb = b[1],
perimeter = 0;
while (++i < n) {
xa = xb;
ya = yb;
b = polygon[i];
xb = b[0];
yb = b[1];
xa -= xb;
ya -= yb;
perimeter += Math.sqrt(xa * xa + ya * ya);
}
return perimeter;
};
var slice$3 = [].slice;
var noabort = {};
function Queue(size) {
this._size = size;
this._call =
this._error = null;
this._tasks = [];
this._data = [];
this._waiting =
this._active =
this._ended =
this._start = 0; // inside a synchronous task callback?
}
Queue.prototype = queue.prototype = {
constructor: Queue,
defer: function(callback) {
if (typeof callback !== "function") throw new Error("invalid callback");
if (this._call) throw new Error("defer after await");
if (this._error != null) return this;
var t = slice$3.call(arguments, 1);
t.push(callback);
++this._waiting, this._tasks.push(t);
poke$1(this);
return this;
},
abort: function() {
if (this._error == null) abort(this, new Error("abort"));
return this;
},
await: function(callback) {
if (typeof callback !== "function") throw new Error("invalid callback");
if (this._call) throw new Error("multiple await");
this._call = function(error, results) { callback.apply(null, [error].concat(results)); };
maybeNotify(this);
return this;
},
awaitAll: function(callback) {
if (typeof callback !== "function") throw new Error("invalid callback");
if (this._call) throw new Error("multiple await");
this._call = callback;
maybeNotify(this);
return this;
}
};
function poke$1(q) {
if (!q._start) {
try { start$1(q); } // let the current task complete
catch (e) {
if (q._tasks[q._ended + q._active - 1]) abort(q, e); // task errored synchronously
else if (!q._data) throw e; // await callback errored synchronously
}
}
}
function start$1(q) {
while (q._start = q._waiting && q._active < q._size) {
var i = q._ended + q._active,
t = q._tasks[i],
j = t.length - 1,
c = t[j];
t[j] = end(q, i);
--q._waiting, ++q._active;
t = c.apply(null, t);
if (!q._tasks[i]) continue; // task finished synchronously
q._tasks[i] = t || noabort;
}
}
function end(q, i) {
return function(e, r) {
if (!q._tasks[i]) return; // ignore multiple callbacks
--q._active, ++q._ended;
q._tasks[i] = null;
if (q._error != null) return; // ignore secondary errors
if (e != null) {
abort(q, e);
} else {
q._data[i] = r;
if (q._waiting) poke$1(q);
else maybeNotify(q);
}
};
}
function abort(q, e) {
var i = q._tasks.length, t;
q._error = e; // ignore active callbacks
q._data = undefined; // allow gc
q._waiting = NaN; // prevent starting
while (--i >= 0) {
if (t = q._tasks[i]) {
q._tasks[i] = null;
if (t.abort) {
try { t.abort(); }
catch (e) { /* ignore */ }
}
}
}
q._active = NaN; // allow notification
maybeNotify(q);
}
function maybeNotify(q) {
if (!q._active && q._call) {
var d = q._data;
q._data = undefined; // allow gc
q._call(q._error, d);
}
}
function queue(concurrency) {
if (concurrency == null) concurrency = Infinity;
else if (!((concurrency = +concurrency) >= 1)) throw new Error("invalid concurrency");
return new Queue(concurrency);
}
var defaultSource$1 = function() {
return Math.random();
};
var uniform = ((function sourceRandomUniform(source) {
function randomUniform(min, max) {
min = min == null ? 0 : +min;
max = max == null ? 1 : +max;
if (arguments.length === 1) max = min, min = 0;
else max -= min;
return function() {
return source() * max + min;
};
}
randomUniform.source = sourceRandomUniform;
return randomUniform;
}))(defaultSource$1);
var normal = ((function sourceRandomNormal(source) {
function randomNormal(mu, sigma) {
var x, r;
mu = mu == null ? 0 : +mu;
sigma = sigma == null ? 1 : +sigma;
return function() {
var y;
// If available, use the second previously-generated uniform random.
if (x != null) y = x, x = null;
// Otherwise, generate a new x and y.
else do {
x = source() * 2 - 1;
y = source() * 2 - 1;
r = x * x + y * y;
} while (!r || r > 1);
return mu + sigma * y * Math.sqrt(-2 * Math.log(r) / r);
};
}
randomNormal.source = sourceRandomNormal;
return randomNormal;
}))(defaultSource$1);
var logNormal = ((function sourceRandomLogNormal(source) {
function randomLogNormal() {
var randomNormal = normal.source(source).apply(this, arguments);
return function() {
return Math.exp(randomNormal());
};
}
randomLogNormal.source = sourceRandomLogNormal;
return randomLogNormal;
}))(defaultSource$1);
var irwinHall = ((function sourceRandomIrwinHall(source) {
function randomIrwinHall(n) {
return function() {
for (var sum = 0, i = 0; i < n; ++i) sum += source();
return sum;
};
}
randomIrwinHall.source = sourceRandomIrwinHall;
return randomIrwinHall;
}))(defaultSource$1);
var bates = ((function sourceRandomBates(source) {
function randomBates(n) {
var randomIrwinHall = irwinHall.source(source)(n);
return function() {
return randomIrwinHall() / n;
};
}
randomBates.source = sourceRandomBates;
return randomBates;
}))(defaultSource$1);
var exponential$1 = ((function sourceRandomExponential(source) {
function randomExponential(lambda) {
return function() {
return -Math.log(1 - source()) / lambda;
};
}
randomExponential.source = sourceRandomExponential;
return randomExponential;
}))(defaultSource$1);
var request = function(url, callback) {
var request,
event = dispatch("beforesend", "progress", "load", "error"),
mimeType,
headers = map$1(),
xhr = new XMLHttpRequest,
user = null,
password = null,
response,
responseType,
timeout = 0;
// If IE does not support CORS, use XDomainRequest.
if (typeof XDomainRequest !== "undefined"
&& !("withCredentials" in xhr)
&& /^(http(s)?:)?\/\//.test(url)) xhr = new XDomainRequest;
"onload" in xhr
? xhr.onload = xhr.onerror = xhr.ontimeout = respond
: xhr.onreadystatechange = function(o) { xhr.readyState > 3 && respond(o); };
function respond(o) {
var status = xhr.status, result;
if (!status && hasResponse(xhr)
|| status >= 200 && status < 300
|| status === 304) {
if (response) {
try {
result = response.call(request, xhr);
} catch (e) {
event.call("error", request, e);
return;
}
} else {
result = xhr;
}
event.call("load", request, result);
} else {
event.call("error", request, o);
}
}
xhr.onprogress = function(e) {
event.call("progress", request, e);
};
request = {
header: function(name, value) {
name = (name + "").toLowerCase();
if (arguments.length < 2) return headers.get(name);
if (value == null) headers.remove(name);
else headers.set(name, value + "");
return request;
},
// If mimeType is non-null and no Accept header is set, a default is used.
mimeType: function(value) {
if (!arguments.length) return mimeType;
mimeType = value == null ? null : value + "";
return request;
},
// Specifies what type the response value should take;
// for instance, arraybuffer, blob, document, or text.
responseType: function(value) {
if (!arguments.length) return responseType;
responseType = value;
return request;
},
timeout: function(value) {
if (!arguments.length) return timeout;
timeout = +value;
return request;
},
user: function(value) {
return arguments.length < 1 ? user : (user = value == null ? null : value + "", request);
},
password: function(value) {
return arguments.length < 1 ? password : (password = value == null ? null : value + "", request);
},
// Specify how to convert the response content to a specific type;
// changes the callback value on "load" events.
response: function(value) {
response = value;
return request;
},
// Alias for send("GET", …).
get: function(data, callback) {
return request.send("GET", data, callback);
},
// Alias for send("POST", …).
post: function(data, callback) {
return request.send("POST", data, callback);
},
// If callback is non-null, it will be used for error and load events.
send: function(method, data, callback) {
xhr.open(method, url, true, user, password);
if (mimeType != null && !headers.has("accept")) headers.set("accept", mimeType + ",*/*");
if (xhr.setRequestHeader) headers.each(function(value, name) { xhr.setRequestHeader(name, value); });
if (mimeType != null && xhr.overrideMimeType) xhr.overrideMimeType(mimeType);
if (responseType != null) xhr.responseType = responseType;
if (timeout > 0) xhr.timeout = timeout;
if (callback == null && typeof data === "function") callback = data, data = null;
if (callback != null && callback.length === 1) callback = fixCallback(callback);
if (callback != null) request.on("error", callback).on("load", function(xhr) { callback(null, xhr); });
event.call("beforesend", request, xhr);
xhr.send(data == null ? null : data);
return request;
},
abort: function() {
xhr.abort();
return request;
},
on: function() {
var value = event.on.apply(event, arguments);
return value === event ? request : value;
}
};
if (callback != null) {
if (typeof callback !== "function") throw new Error("invalid callback: " + callback);
return request.get(callback);
}
return request;
};
function fixCallback(callback) {
return function(error, xhr) {
callback(error == null ? xhr : null);
};
}
function hasResponse(xhr) {
var type = xhr.responseType;
return type && type !== "text"
? xhr.response // null on error
: xhr.responseText; // "" on error
}
var type$1 = function(defaultMimeType, response) {
return function(url, callback) {
var r = request(url).mimeType(defaultMimeType).response(response);
if (callback != null) {
if (typeof callback !== "function") throw new Error("invalid callback: " + callback);
return r.get(callback);
}
return r;
};
};
var html = type$1("text/html", function(xhr) {
return document.createRange().createContextualFragment(xhr.responseText);
});
var json = type$1("application/json", function(xhr) {
return JSON.parse(xhr.responseText);
});
var text = type$1("text/plain", function(xhr) {
return xhr.responseText;
});
var xml = type$1("application/xml", function(xhr) {
var xml = xhr.responseXML;
if (!xml) throw new Error("parse error");
return xml;
});
var dsv$1 = function(defaultMimeType, parse) {
return function(url, row, callback) {
if (arguments.length < 3) callback = row, row = null;
var r = request(url).mimeType(defaultMimeType);
r.row = function(_) { return arguments.length ? r.response(responseOf(parse, row = _)) : row; };
r.row(row);
return callback ? r.get(callback) : r;
};
};
function responseOf(parse, row) {
return function(request$$1) {
return parse(request$$1.responseText, row);
};
}
var csv$1 = dsv$1("text/csv", csvParse);
var tsv$1 = dsv$1("text/tab-separated-values", tsvParse);
var array$2 = Array.prototype;
var map$3 = array$2.map;
var slice$4 = array$2.slice;
var implicit = {name: "implicit"};
function ordinal(range) {
var index = map$1(),
domain = [],
unknown = implicit;
range = range == null ? [] : slice$4.call(range);
function scale(d) {
var key = d + "", i = index.get(key);
if (!i) {
if (unknown !== implicit) return unknown;
index.set(key, i = domain.push(d));
}
return range[(i - 1) % range.length];
}
scale.domain = function(_) {
if (!arguments.length) return domain.slice();
domain = [], index = map$1();
var i = -1, n = _.length, d, key;
while (++i < n) if (!index.has(key = (d = _[i]) + "")) index.set(key, domain.push(d));
return scale;
};
scale.range = function(_) {
return arguments.length ? (range = slice$4.call(_), scale) : range.slice();
};
scale.unknown = function(_) {
return arguments.length ? (unknown = _, scale) : unknown;
};
scale.copy = function() {
return ordinal()
.domain(domain)
.range(range)
.unknown(unknown);
};
return scale;
}
function band() {
var scale = ordinal().unknown(undefined),
domain = scale.domain,
ordinalRange = scale.range,
range$$1 = [0, 1],
step,
bandwidth,
round = false,
paddingInner = 0,
paddingOuter = 0,
align = 0.5;
delete scale.unknown;
function rescale() {
var n = domain().length,
reverse = range$$1[1] < range$$1[0],
start = range$$1[reverse - 0],
stop = range$$1[1 - reverse];
step = (stop - start) / Math.max(1, n - paddingInner + paddingOuter * 2);
if (round) step = Math.floor(step);
start += (stop - start - step * (n - paddingInner)) * align;
bandwidth = step * (1 - paddingInner);
if (round) start = Math.round(start), bandwidth = Math.round(bandwidth);
var values = sequence(n).map(function(i) { return start + step * i; });
return ordinalRange(reverse ? values.reverse() : values);
}
scale.domain = function(_) {
return arguments.length ? (domain(_), rescale()) : domain();
};
scale.range = function(_) {
return arguments.length ? (range$$1 = [+_[0], +_[1]], rescale()) : range$$1.slice();
};
scale.rangeRound = function(_) {
return range$$1 = [+_[0], +_[1]], round = true, rescale();
};
scale.bandwidth = function() {
return bandwidth;
};
scale.step = function() {
return step;
};
scale.round = function(_) {
return arguments.length ? (round = !!_, rescale()) : round;
};
scale.padding = function(_) {
return arguments.length ? (paddingInner = paddingOuter = Math.max(0, Math.min(1, _)), rescale()) : paddingInner;
};
scale.paddingInner = function(_) {
return arguments.length ? (paddingInner = Math.max(0, Math.min(1, _)), rescale()) : paddingInner;
};
scale.paddingOuter = function(_) {
return arguments.length ? (paddingOuter = Math.max(0, Math.min(1, _)), rescale()) : paddingOuter;
};
scale.align = function(_) {
return arguments.length ? (align = Math.max(0, Math.min(1, _)), rescale()) : align;
};
scale.copy = function() {
return band()
.domain(domain())
.range(range$$1)
.round(round)
.paddingInner(paddingInner)
.paddingOuter(paddingOuter)
.align(align);
};
return rescale();
}
function pointish(scale) {
var copy = scale.copy;
scale.padding = scale.paddingOuter;
delete scale.paddingInner;
delete scale.paddingOuter;
scale.copy = function() {
return pointish(copy());
};
return scale;
}
function point$1() {
return pointish(band().paddingInner(1));
}
var constant$9 = function(x) {
return function() {
return x;
};
};
var number$1 = function(x) {
return +x;
};
var unit = [0, 1];
function deinterpolateLinear(a, b) {
return (b -= (a = +a))
? function(x) { return (x - a) / b; }
: constant$9(b);
}
function deinterpolateClamp(deinterpolate) {
return function(a, b) {
var d = deinterpolate(a = +a, b = +b);
return function(x) { return x <= a ? 0 : x >= b ? 1 : d(x); };
};
}
function reinterpolateClamp(reinterpolate) {
return function(a, b) {
var r = reinterpolate(a = +a, b = +b);
return function(t) { return t <= 0 ? a : t >= 1 ? b : r(t); };
};
}
function bimap(domain, range$$1, deinterpolate, reinterpolate) {
var d0 = domain[0], d1 = domain[1], r0 = range$$1[0], r1 = range$$1[1];
if (d1 < d0) d0 = deinterpolate(d1, d0), r0 = reinterpolate(r1, r0);
else d0 = deinterpolate(d0, d1), r0 = reinterpolate(r0, r1);
return function(x) { return r0(d0(x)); };
}
function polymap(domain, range$$1, deinterpolate, reinterpolate) {
var j = Math.min(domain.length, range$$1.length) - 1,
d = new Array(j),
r = new Array(j),
i = -1;
// Reverse descending domains.
if (domain[j] < domain[0]) {
domain = domain.slice().reverse();
range$$1 = range$$1.slice().reverse();
}
while (++i < j) {
d[i] = deinterpolate(domain[i], domain[i + 1]);
r[i] = reinterpolate(range$$1[i], range$$1[i + 1]);
}
return function(x) {
var i = bisectRight(domain, x, 1, j) - 1;
return r[i](d[i](x));
};
}
function copy(source, target) {
return target
.domain(source.domain())
.range(source.range())
.interpolate(source.interpolate())
.clamp(source.clamp());
}
// deinterpolate(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].
// reinterpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding domain value x in [a,b].
function continuous(deinterpolate, reinterpolate) {
var domain = unit,
range$$1 = unit,
interpolate$$1 = interpolateValue,
clamp = false,
piecewise,
output,
input;
function rescale() {
piecewise = Math.min(domain.length, range$$1.length) > 2 ? polymap : bimap;
output = input = null;
return scale;
}
function scale(x) {
return (output || (output = piecewise(domain, range$$1, clamp ? deinterpolateClamp(deinterpolate) : deinterpolate, interpolate$$1)))(+x);
}
scale.invert = function(y) {
return (input || (input = piecewise(range$$1, domain, deinterpolateLinear, clamp ? reinterpolateClamp(reinterpolate) : reinterpolate)))(+y);
};
scale.domain = function(_) {
return arguments.length ? (domain = map$3.call(_, number$1), rescale()) : domain.slice();
};
scale.range = function(_) {
return arguments.length ? (range$$1 = slice$4.call(_), rescale()) : range$$1.slice();
};
scale.rangeRound = function(_) {
return range$$1 = slice$4.call(_), interpolate$$1 = interpolateRound, rescale();
};
scale.clamp = function(_) {
return arguments.length ? (clamp = !!_, rescale()) : clamp;
};
scale.interpolate = function(_) {
return arguments.length ? (interpolate$$1 = _, rescale()) : interpolate$$1;
};
return rescale();
}
var tickFormat = function(domain, count, specifier) {
var start = domain[0],
stop = domain[domain.length - 1],
step = tickStep(start, stop, count == null ? 10 : count),
precision;
specifier = formatSpecifier(specifier == null ? ",f" : specifier);
switch (specifier.type) {
case "s": {
var value = Math.max(Math.abs(start), Math.abs(stop));
if (specifier.precision == null && !isNaN(precision = precisionPrefix(step, value))) specifier.precision = precision;
return exports.formatPrefix(specifier, value);
}
case "":
case "e":
case "g":
case "p":
case "r": {
if (specifier.precision == null && !isNaN(precision = precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) specifier.precision = precision - (specifier.type === "e");
break;
}
case "f":
case "%": {
if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === "%") * 2;
break;
}
}
return exports.format(specifier);
};
function linearish(scale) {
var domain = scale.domain;
scale.ticks = function(count) {
var d = domain();
return ticks(d[0], d[d.length - 1], count == null ? 10 : count);
};
scale.tickFormat = function(count, specifier) {
return tickFormat(domain(), count, specifier);
};
scale.nice = function(count) {
if (count == null) count = 10;
var d = domain(),
i0 = 0,
i1 = d.length - 1,
start = d[i0],
stop = d[i1],
step;
if (stop < start) {
step = start, start = stop, stop = step;
step = i0, i0 = i1, i1 = step;
}
step = tickIncrement(start, stop, count);
if (step > 0) {
start = Math.floor(start / step) * step;
stop = Math.ceil(stop / step) * step;
step = tickIncrement(start, stop, count);
} else if (step < 0) {
start = Math.ceil(start * step) / step;
stop = Math.floor(stop * step) / step;
step = tickIncrement(start, stop, count);
}
if (step > 0) {
d[i0] = Math.floor(start / step) * step;
d[i1] = Math.ceil(stop / step) * step;
domain(d);
} else if (step < 0) {
d[i0] = Math.ceil(start * step) / step;
d[i1] = Math.floor(stop * step) / step;
domain(d);
}
return scale;
};
return scale;
}
function linear$2() {
var scale = continuous(deinterpolateLinear, reinterpolate);
scale.copy = function() {
return copy(scale, linear$2());
};
return linearish(scale);
}
function identity$6() {
var domain = [0, 1];
function scale(x) {
return +x;
}
scale.invert = scale;
scale.domain = scale.range = function(_) {
return arguments.length ? (domain = map$3.call(_, number$1), scale) : domain.slice();
};
scale.copy = function() {
return identity$6().domain(domain);
};
return linearish(scale);
}
var nice = function(domain, interval) {
domain = domain.slice();
var i0 = 0,
i1 = domain.length - 1,
x0 = domain[i0],
x1 = domain[i1],
t;
if (x1 < x0) {
t = i0, i0 = i1, i1 = t;
t = x0, x0 = x1, x1 = t;
}
domain[i0] = interval.floor(x0);
domain[i1] = interval.ceil(x1);
return domain;
};
function deinterpolate(a, b) {
return (b = Math.log(b / a))
? function(x) { return Math.log(x / a) / b; }
: constant$9(b);
}
function reinterpolate$1(a, b) {
return a < 0
? function(t) { return -Math.pow(-b, t) * Math.pow(-a, 1 - t); }
: function(t) { return Math.pow(b, t) * Math.pow(a, 1 - t); };
}
function pow10(x) {
return isFinite(x) ? +("1e" + x) : x < 0 ? 0 : x;
}
function powp(base) {
return base === 10 ? pow10
: base === Math.E ? Math.exp
: function(x) { return Math.pow(base, x); };
}
function logp(base) {
return base === Math.E ? Math.log
: base === 10 && Math.log10
|| base === 2 && Math.log2
|| (base = Math.log(base), function(x) { return Math.log(x) / base; });
}
function reflect(f) {
return function(x) {
return -f(-x);
};
}
function log$1() {
var scale = continuous(deinterpolate, reinterpolate$1).domain([1, 10]),
domain = scale.domain,
base = 10,
logs = logp(10),
pows = powp(10);
function rescale() {
logs = logp(base), pows = powp(base);
if (domain()[0] < 0) logs = reflect(logs), pows = reflect(pows);
return scale;
}
scale.base = function(_) {
return arguments.length ? (base = +_, rescale()) : base;
};
scale.domain = function(_) {
return arguments.length ? (domain(_), rescale()) : domain();
};
scale.ticks = function(count) {
var d = domain(),
u = d[0],
v = d[d.length - 1],
r;
if (r = v < u) i = u, u = v, v = i;
var i = logs(u),
j = logs(v),
p,
k,
t,
n = count == null ? 10 : +count,
z = [];
if (!(base % 1) && j - i < n) {
i = Math.round(i) - 1, j = Math.round(j) + 1;
if (u > 0) for (; i < j; ++i) {
for (k = 1, p = pows(i); k < base; ++k) {
t = p * k;
if (t < u) continue;
if (t > v) break;
z.push(t);
}
} else for (; i < j; ++i) {
for (k = base - 1, p = pows(i); k >= 1; --k) {
t = p * k;
if (t < u) continue;
if (t > v) break;
z.push(t);
}
}
} else {
z = ticks(i, j, Math.min(j - i, n)).map(pows);
}
return r ? z.reverse() : z;
};
scale.tickFormat = function(count, specifier) {
if (specifier == null) specifier = base === 10 ? ".0e" : ",";
if (typeof specifier !== "function") specifier = exports.format(specifier);
if (count === Infinity) return specifier;
if (count == null) count = 10;
var k = Math.max(1, base * count / scale.ticks().length); // TODO fast estimate?
return function(d) {
var i = d / pows(Math.round(logs(d)));
if (i * base < base - 0.5) i *= base;
return i <= k ? specifier(d) : "";
};
};
scale.nice = function() {
return domain(nice(domain(), {
floor: function(x) { return pows(Math.floor(logs(x))); },
ceil: function(x) { return pows(Math.ceil(logs(x))); }
}));
};
scale.copy = function() {
return copy(scale, log$1().base(base));
};
return scale;
}
function raise$1(x, exponent) {
return x < 0 ? -Math.pow(-x, exponent) : Math.pow(x, exponent);
}
function pow$1() {
var exponent = 1,
scale = continuous(deinterpolate, reinterpolate),
domain = scale.domain;
function deinterpolate(a, b) {
return (b = raise$1(b, exponent) - (a = raise$1(a, exponent)))
? function(x) { return (raise$1(x, exponent) - a) / b; }
: constant$9(b);
}
function reinterpolate(a, b) {
b = raise$1(b, exponent) - (a = raise$1(a, exponent));
return function(t) { return raise$1(a + b * t, 1 / exponent); };
}
scale.exponent = function(_) {
return arguments.length ? (exponent = +_, domain(domain())) : exponent;
};
scale.copy = function() {
return copy(scale, pow$1().exponent(exponent));
};
return linearish(scale);
}
function sqrt$1() {
return pow$1().exponent(0.5);
}
function quantile$$1() {
var domain = [],
range$$1 = [],
thresholds = [];
function rescale() {
var i = 0, n = Math.max(1, range$$1.length);
thresholds = new Array(n - 1);
while (++i < n) thresholds[i - 1] = threshold(domain, i / n);
return scale;
}
function scale(x) {
if (!isNaN(x = +x)) return range$$1[bisectRight(thresholds, x)];
}
scale.invertExtent = function(y) {
var i = range$$1.indexOf(y);
return i < 0 ? [NaN, NaN] : [
i > 0 ? thresholds[i - 1] : domain[0],
i < thresholds.length ? thresholds[i] : domain[domain.length - 1]
];
};
scale.domain = function(_) {
if (!arguments.length) return domain.slice();
domain = [];
for (var i = 0, n = _.length, d; i < n; ++i) if (d = _[i], d != null && !isNaN(d = +d)) domain.push(d);
domain.sort(ascending);
return rescale();
};
scale.range = function(_) {
return arguments.length ? (range$$1 = slice$4.call(_), rescale()) : range$$1.slice();
};
scale.quantiles = function() {
return thresholds.slice();
};
scale.copy = function() {
return quantile$$1()
.domain(domain)
.range(range$$1);
};
return scale;
}
function quantize$1() {
var x0 = 0,
x1 = 1,
n = 1,
domain = [0.5],
range$$1 = [0, 1];
function scale(x) {
if (x <= x) return range$$1[bisectRight(domain, x, 0, n)];
}
function rescale() {
var i = -1;
domain = new Array(n);
while (++i < n) domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);
return scale;
}
scale.domain = function(_) {
return arguments.length ? (x0 = +_[0], x1 = +_[1], rescale()) : [x0, x1];
};
scale.range = function(_) {
return arguments.length ? (n = (range$$1 = slice$4.call(_)).length - 1, rescale()) : range$$1.slice();
};
scale.invertExtent = function(y) {
var i = range$$1.indexOf(y);
return i < 0 ? [NaN, NaN]
: i < 1 ? [x0, domain[0]]
: i >= n ? [domain[n - 1], x1]
: [domain[i - 1], domain[i]];
};
scale.copy = function() {
return quantize$1()
.domain([x0, x1])
.range(range$$1);
};
return linearish(scale);
}
function threshold$1() {
var domain = [0.5],
range$$1 = [0, 1],
n = 1;
function scale(x) {
if (x <= x) return range$$1[bisectRight(domain, x, 0, n)];
}
scale.domain = function(_) {
return arguments.length ? (domain = slice$4.call(_), n = Math.min(domain.length, range$$1.length - 1), scale) : domain.slice();
};
scale.range = function(_) {
return arguments.length ? (range$$1 = slice$4.call(_), n = Math.min(domain.length, range$$1.length - 1), scale) : range$$1.slice();
};
scale.invertExtent = function(y) {
var i = range$$1.indexOf(y);
return [domain[i - 1], domain[i]];
};
scale.copy = function() {
return threshold$1()
.domain(domain)
.range(range$$1);
};
return scale;
}
var t0$1 = new Date;
var t1$1 = new Date;
function newInterval(floori, offseti, count, field) {
function interval(date) {
return floori(date = new Date(+date)), date;
}
interval.floor = interval;
interval.ceil = function(date) {
return floori(date = new Date(date - 1)), offseti(date, 1), floori(date), date;
};
interval.round = function(date) {
var d0 = interval(date),
d1 = interval.ceil(date);
return date - d0 < d1 - date ? d0 : d1;
};
interval.offset = function(date, step) {
return offseti(date = new Date(+date), step == null ? 1 : Math.floor(step)), date;
};
interval.range = function(start, stop, step) {
var range = [];
start = interval.ceil(start);
step = step == null ? 1 : Math.floor(step);
if (!(start < stop) || !(step > 0)) return range; // also handles Invalid Date
do range.push(new Date(+start)); while (offseti(start, step), floori(start), start < stop)
return range;
};
interval.filter = function(test) {
return newInterval(function(date) {
if (date >= date) while (floori(date), !test(date)) date.setTime(date - 1);
}, function(date, step) {
if (date >= date) while (--step >= 0) while (offseti(date, 1), !test(date)) {} // eslint-disable-line no-empty
});
};
if (count) {
interval.count = function(start, end) {
t0$1.setTime(+start), t1$1.setTime(+end);
floori(t0$1), floori(t1$1);
return Math.floor(count(t0$1, t1$1));
};
interval.every = function(step) {
step = Math.floor(step);
return !isFinite(step) || !(step > 0) ? null
: !(step > 1) ? interval
: interval.filter(field
? function(d) { return field(d) % step === 0; }
: function(d) { return interval.count(0, d) % step === 0; });
};
}
return interval;
}
var millisecond = newInterval(function() {
// noop
}, function(date, step) {
date.setTime(+date + step);
}, function(start, end) {
return end - start;
});
// An optimized implementation for this simple case.
millisecond.every = function(k) {
k = Math.floor(k);
if (!isFinite(k) || !(k > 0)) return null;
if (!(k > 1)) return millisecond;
return newInterval(function(date) {
date.setTime(Math.floor(date / k) * k);
}, function(date, step) {
date.setTime(+date + step * k);
}, function(start, end) {
return (end - start) / k;
});
};
var milliseconds = millisecond.range;
var durationSecond$1 = 1e3;
var durationMinute$1 = 6e4;
var durationHour$1 = 36e5;
var durationDay$1 = 864e5;
var durationWeek$1 = 6048e5;
var second = newInterval(function(date) {
date.setTime(Math.floor(date / durationSecond$1) * durationSecond$1);
}, function(date, step) {
date.setTime(+date + step * durationSecond$1);
}, function(start, end) {
return (end - start) / durationSecond$1;
}, function(date) {
return date.getUTCSeconds();
});
var seconds = second.range;
var minute = newInterval(function(date) {
date.setTime(Math.floor(date / durationMinute$1) * durationMinute$1);
}, function(date, step) {
date.setTime(+date + step * durationMinute$1);
}, function(start, end) {
return (end - start) / durationMinute$1;
}, function(date) {
return date.getMinutes();
});
var minutes = minute.range;
var hour = newInterval(function(date) {
var offset = date.getTimezoneOffset() * durationMinute$1 % durationHour$1;
if (offset < 0) offset += durationHour$1;
date.setTime(Math.floor((+date - offset) / durationHour$1) * durationHour$1 + offset);
}, function(date, step) {
date.setTime(+date + step * durationHour$1);
}, function(start, end) {
return (end - start) / durationHour$1;
}, function(date) {
return date.getHours();
});
var hours = hour.range;
var day = newInterval(function(date) {
date.setHours(0, 0, 0, 0);
}, function(date, step) {
date.setDate(date.getDate() + step);
}, function(start, end) {
return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute$1) / durationDay$1;
}, function(date) {
return date.getDate() - 1;
});
var days = day.range;
function weekday(i) {
return newInterval(function(date) {
date.setDate(date.getDate() - (date.getDay() + 7 - i) % 7);
date.setHours(0, 0, 0, 0);
}, function(date, step) {
date.setDate(date.getDate() + step * 7);
}, function(start, end) {
return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute$1) / durationWeek$1;
});
}
var sunday = weekday(0);
var monday = weekday(1);
var tuesday = weekday(2);
var wednesday = weekday(3);
var thursday = weekday(4);
var friday = weekday(5);
var saturday = weekday(6);
var sundays = sunday.range;
var mondays = monday.range;
var tuesdays = tuesday.range;
var wednesdays = wednesday.range;
var thursdays = thursday.range;
var fridays = friday.range;
var saturdays = saturday.range;
var month = newInterval(function(date) {
date.setDate(1);
date.setHours(0, 0, 0, 0);
}, function(date, step) {
date.setMonth(date.getMonth() + step);
}, function(start, end) {
return end.getMonth() - start.getMonth() + (end.getFullYear() - start.getFullYear()) * 12;
}, function(date) {
return date.getMonth();
});
var months = month.range;
var year = newInterval(function(date) {
date.setMonth(0, 1);
date.setHours(0, 0, 0, 0);
}, function(date, step) {
date.setFullYear(date.getFullYear() + step);
}, function(start, end) {
return end.getFullYear() - start.getFullYear();
}, function(date) {
return date.getFullYear();
});
// An optimized implementation for this simple case.
year.every = function(k) {
return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) {
date.setFullYear(Math.floor(date.getFullYear() / k) * k);
date.setMonth(0, 1);
date.setHours(0, 0, 0, 0);
}, function(date, step) {
date.setFullYear(date.getFullYear() + step * k);
});
};
var years = year.range;
var utcMinute = newInterval(function(date) {
date.setUTCSeconds(0, 0);
}, function(date, step) {
date.setTime(+date + step * durationMinute$1);
}, function(start, end) {
return (end - start) / durationMinute$1;
}, function(date) {
return date.getUTCMinutes();
});
var utcMinutes = utcMinute.range;
var utcHour = newInterval(function(date) {
date.setUTCMinutes(0, 0, 0);
}, function(date, step) {
date.setTime(+date + step * durationHour$1);
}, function(start, end) {
return (end - start) / durationHour$1;
}, function(date) {
return date.getUTCHours();
});
var utcHours = utcHour.range;
var utcDay = newInterval(function(date) {
date.setUTCHours(0, 0, 0, 0);
}, function(date, step) {
date.setUTCDate(date.getUTCDate() + step);
}, function(start, end) {
return (end - start) / durationDay$1;
}, function(date) {
return date.getUTCDate() - 1;
});
var utcDays = utcDay.range;
function utcWeekday(i) {
return newInterval(function(date) {
date.setUTCDate(date.getUTCDate() - (date.getUTCDay() + 7 - i) % 7);
date.setUTCHours(0, 0, 0, 0);
}, function(date, step) {
date.setUTCDate(date.getUTCDate() + step * 7);
}, function(start, end) {
return (end - start) / durationWeek$1;
});
}
var utcSunday = utcWeekday(0);
var utcMonday = utcWeekday(1);
var utcTuesday = utcWeekday(2);
var utcWednesday = utcWeekday(3);
var utcThursday = utcWeekday(4);
var utcFriday = utcWeekday(5);
var utcSaturday = utcWeekday(6);
var utcSundays = utcSunday.range;
var utcMondays = utcMonday.range;
var utcTuesdays = utcTuesday.range;
var utcWednesdays = utcWednesday.range;
var utcThursdays = utcThursday.range;
var utcFridays = utcFriday.range;
var utcSaturdays = utcSaturday.range;
var utcMonth = newInterval(function(date) {
date.setUTCDate(1);
date.setUTCHours(0, 0, 0, 0);
}, function(date, step) {
date.setUTCMonth(date.getUTCMonth() + step);
}, function(start, end) {
return end.getUTCMonth() - start.getUTCMonth() + (end.getUTCFullYear() - start.getUTCFullYear()) * 12;
}, function(date) {
return date.getUTCMonth();
});
var utcMonths = utcMonth.range;
var utcYear = newInterval(function(date) {
date.setUTCMonth(0, 1);
date.setUTCHours(0, 0, 0, 0);
}, function(date, step) {
date.setUTCFullYear(date.getUTCFullYear() + step);
}, function(start, end) {
return end.getUTCFullYear() - start.getUTCFullYear();
}, function(date) {
return date.getUTCFullYear();
});
// An optimized implementation for this simple case.
utcYear.every = function(k) {
return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) {
date.setUTCFullYear(Math.floor(date.getUTCFullYear() / k) * k);
date.setUTCMonth(0, 1);
date.setUTCHours(0, 0, 0, 0);
}, function(date, step) {
date.setUTCFullYear(date.getUTCFullYear() + step * k);
});
};
var utcYears = utcYear.range;
function localDate(d) {
if (0 <= d.y && d.y < 100) {
var date = new Date(-1, d.m, d.d, d.H, d.M, d.S, d.L);
date.setFullYear(d.y);
return date;
}
return new Date(d.y, d.m, d.d, d.H, d.M, d.S, d.L);
}
function utcDate(d) {
if (0 <= d.y && d.y < 100) {
var date = new Date(Date.UTC(-1, d.m, d.d, d.H, d.M, d.S, d.L));
date.setUTCFullYear(d.y);
return date;
}
return new Date(Date.UTC(d.y, d.m, d.d, d.H, d.M, d.S, d.L));
}
function newYear(y) {
return {y: y, m: 0, d: 1, H: 0, M: 0, S: 0, L: 0};
}
function formatLocale$1(locale) {
var locale_dateTime = locale.dateTime,
locale_date = locale.date,
locale_time = locale.time,
locale_periods = locale.periods,
locale_weekdays = locale.days,
locale_shortWeekdays = locale.shortDays,
locale_months = locale.months,
locale_shortMonths = locale.shortMonths;
var periodRe = formatRe(locale_periods),
periodLookup = formatLookup(locale_periods),
weekdayRe = formatRe(locale_weekdays),
weekdayLookup = formatLookup(locale_weekdays),
shortWeekdayRe = formatRe(locale_shortWeekdays),
shortWeekdayLookup = formatLookup(locale_shortWeekdays),
monthRe = formatRe(locale_months),
monthLookup = formatLookup(locale_months),
shortMonthRe = formatRe(locale_shortMonths),
shortMonthLookup = formatLookup(locale_shortMonths);
var formats = {
"a": formatShortWeekday,
"A": formatWeekday,
"b": formatShortMonth,
"B": formatMonth,
"c": null,
"d": formatDayOfMonth,
"e": formatDayOfMonth,
"H": formatHour24,
"I": formatHour12,
"j": formatDayOfYear,
"L": formatMilliseconds,
"m": formatMonthNumber,
"M": formatMinutes,
"p": formatPeriod,
"S": formatSeconds,
"U": formatWeekNumberSunday,
"w": formatWeekdayNumber,
"W": formatWeekNumberMonday,
"x": null,
"X": null,
"y": formatYear,
"Y": formatFullYear,
"Z": formatZone,
"%": formatLiteralPercent
};
var utcFormats = {
"a": formatUTCShortWeekday,
"A": formatUTCWeekday,
"b": formatUTCShortMonth,
"B": formatUTCMonth,
"c": null,
"d": formatUTCDayOfMonth,
"e": formatUTCDayOfMonth,
"H": formatUTCHour24,
"I": formatUTCHour12,
"j": formatUTCDayOfYear,
"L": formatUTCMilliseconds,
"m": formatUTCMonthNumber,
"M": formatUTCMinutes,
"p": formatUTCPeriod,
"S": formatUTCSeconds,
"U": formatUTCWeekNumberSunday,
"w": formatUTCWeekdayNumber,
"W": formatUTCWeekNumberMonday,
"x": null,
"X": null,
"y": formatUTCYear,
"Y": formatUTCFullYear,
"Z": formatUTCZone,
"%": formatLiteralPercent
};
var parses = {
"a": parseShortWeekday,
"A": parseWeekday,
"b": parseShortMonth,
"B": parseMonth,
"c": parseLocaleDateTime,
"d": parseDayOfMonth,
"e": parseDayOfMonth,
"H": parseHour24,
"I": parseHour24,
"j": parseDayOfYear,
"L": parseMilliseconds,
"m": parseMonthNumber,
"M": parseMinutes,
"p": parsePeriod,
"S": parseSeconds,
"U": parseWeekNumberSunday,
"w": parseWeekdayNumber,
"W": parseWeekNumberMonday,
"x": parseLocaleDate,
"X": parseLocaleTime,
"y": parseYear,
"Y": parseFullYear,
"Z": parseZone,
"%": parseLiteralPercent
};
// These recursive directive definitions must be deferred.
formats.x = newFormat(locale_date, formats);
formats.X = newFormat(locale_time, formats);
formats.c = newFormat(locale_dateTime, formats);
utcFormats.x = newFormat(locale_date, utcFormats);
utcFormats.X = newFormat(locale_time, utcFormats);
utcFormats.c = newFormat(locale_dateTime, utcFormats);
function newFormat(specifier, formats) {
return function(date) {
var string = [],
i = -1,
j = 0,
n = specifier.length,
c,
pad,
format;
if (!(date instanceof Date)) date = new Date(+date);
while (++i < n) {
if (specifier.charCodeAt(i) === 37) {
string.push(specifier.slice(j, i));
if ((pad = pads[c = specifier.charAt(++i)]) != null) c = specifier.charAt(++i);
else pad = c === "e" ? " " : "0";
if (format = formats[c]) c = format(date, pad);
string.push(c);
j = i + 1;
}
}
string.push(specifier.slice(j, i));
return string.join("");
};
}
function newParse(specifier, newDate) {
return function(string) {
var d = newYear(1900),
i = parseSpecifier(d, specifier, string += "", 0);
if (i != string.length) return null;
// The am-pm flag is 0 for AM, and 1 for PM.
if ("p" in d) d.H = d.H % 12 + d.p * 12;
// Convert day-of-week and week-of-year to day-of-year.
if ("W" in d || "U" in d) {
if (!("w" in d)) d.w = "W" in d ? 1 : 0;
var day$$1 = "Z" in d ? utcDate(newYear(d.y)).getUTCDay() : newDate(newYear(d.y)).getDay();
d.m = 0;
d.d = "W" in d ? (d.w + 6) % 7 + d.W * 7 - (day$$1 + 5) % 7 : d.w + d.U * 7 - (day$$1 + 6) % 7;
}
// If a time zone is specified, all fields are interpreted as UTC and then
// offset according to the specified time zone.
if ("Z" in d) {
d.H += d.Z / 100 | 0;
d.M += d.Z % 100;
return utcDate(d);
}
// Otherwise, all fields are in local time.
return newDate(d);
};
}
function parseSpecifier(d, specifier, string, j) {
var i = 0,
n = specifier.length,
m = string.length,
c,
parse;
while (i < n) {
if (j >= m) return -1;
c = specifier.charCodeAt(i++);
if (c === 37) {
c = specifier.charAt(i++);
parse = parses[c in pads ? specifier.charAt(i++) : c];
if (!parse || ((j = parse(d, string, j)) < 0)) return -1;
} else if (c != string.charCodeAt(j++)) {
return -1;
}
}
return j;
}
function parsePeriod(d, string, i) {
var n = periodRe.exec(string.slice(i));
return n ? (d.p = periodLookup[n[0].toLowerCase()], i + n[0].length) : -1;
}
function parseShortWeekday(d, string, i) {
var n = shortWeekdayRe.exec(string.slice(i));
return n ? (d.w = shortWeekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1;
}
function parseWeekday(d, string, i) {
var n = weekdayRe.exec(string.slice(i));
return n ? (d.w = weekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1;
}
function parseShortMonth(d, string, i) {
var n = shortMonthRe.exec(string.slice(i));
return n ? (d.m = shortMonthLookup[n[0].toLowerCase()], i + n[0].length) : -1;
}
function parseMonth(d, string, i) {
var n = monthRe.exec(string.slice(i));
return n ? (d.m = monthLookup[n[0].toLowerCase()], i + n[0].length) : -1;
}
function parseLocaleDateTime(d, string, i) {
return parseSpecifier(d, locale_dateTime, string, i);
}
function parseLocaleDate(d, string, i) {
return parseSpecifier(d, locale_date, string, i);
}
function parseLocaleTime(d, string, i) {
return parseSpecifier(d, locale_time, string, i);
}
function formatShortWeekday(d) {
return locale_shortWeekdays[d.getDay()];
}
function formatWeekday(d) {
return locale_weekdays[d.getDay()];
}
function formatShortMonth(d) {
return locale_shortMonths[d.getMonth()];
}
function formatMonth(d) {
return locale_months[d.getMonth()];
}
function formatPeriod(d) {
return locale_periods[+(d.getHours() >= 12)];
}
function formatUTCShortWeekday(d) {
return locale_shortWeekdays[d.getUTCDay()];
}
function formatUTCWeekday(d) {
return locale_weekdays[d.getUTCDay()];
}
function formatUTCShortMonth(d) {
return locale_shortMonths[d.getUTCMonth()];
}
function formatUTCMonth(d) {
return locale_months[d.getUTCMonth()];
}
function formatUTCPeriod(d) {
return locale_periods[+(d.getUTCHours() >= 12)];
}
return {
format: function(specifier) {
var f = newFormat(specifier += "", formats);
f.toString = function() { return specifier; };
return f;
},
parse: function(specifier) {
var p = newParse(specifier += "", localDate);
p.toString = function() { return specifier; };
return p;
},
utcFormat: function(specifier) {
var f = newFormat(specifier += "", utcFormats);
f.toString = function() { return specifier; };
return f;
},
utcParse: function(specifier) {
var p = newParse(specifier, utcDate);
p.toString = function() { return specifier; };
return p;
}
};
}
var pads = {"-": "", "_": " ", "0": "0"};
var numberRe = /^\s*\d+/;
var percentRe = /^%/;
var requoteRe = /[\\\^\$\*\+\?\|\[\]\(\)\.\{\}]/g;
function pad(value, fill, width) {
var sign = value < 0 ? "-" : "",
string = (sign ? -value : value) + "",
length = string.length;
return sign + (length < width ? new Array(width - length + 1).join(fill) + string : string);
}
function requote(s) {
return s.replace(requoteRe, "\\$&");
}
function formatRe(names) {
return new RegExp("^(?:" + names.map(requote).join("|") + ")", "i");
}
function formatLookup(names) {
var map = {}, i = -1, n = names.length;
while (++i < n) map[names[i].toLowerCase()] = i;
return map;
}
function parseWeekdayNumber(d, string, i) {
var n = numberRe.exec(string.slice(i, i + 1));
return n ? (d.w = +n[0], i + n[0].length) : -1;
}
function parseWeekNumberSunday(d, string, i) {
var n = numberRe.exec(string.slice(i));
return n ? (d.U = +n[0], i + n[0].length) : -1;
}
function parseWeekNumberMonday(d, string, i) {
var n = numberRe.exec(string.slice(i));
return n ? (d.W = +n[0], i + n[0].length) : -1;
}
function parseFullYear(d, string, i) {
var n = numberRe.exec(string.slice(i, i + 4));
return n ? (d.y = +n[0], i + n[0].length) : -1;
}
function parseYear(d, string, i) {
var n = numberRe.exec(string.slice(i, i + 2));
return n ? (d.y = +n[0] + (+n[0] > 68 ? 1900 : 2000), i + n[0].length) : -1;
}
function parseZone(d, string, i) {
var n = /^(Z)|([+-]\d\d)(?:\:?(\d\d))?/.exec(string.slice(i, i + 6));
return n ? (d.Z = n[1] ? 0 : -(n[2] + (n[3] || "00")), i + n[0].length) : -1;
}
function parseMonthNumber(d, string, i) {
var n = numberRe.exec(string.slice(i, i + 2));
return n ? (d.m = n[0] - 1, i + n[0].length) : -1;
}
function parseDayOfMonth(d, string, i) {
var n = numberRe.exec(string.slice(i, i + 2));
return n ? (d.d = +n[0], i + n[0].length) : -1;
}
function parseDayOfYear(d, string, i) {
var n = numberRe.exec(string.slice(i, i + 3));
return n ? (d.m = 0, d.d = +n[0], i + n[0].length) : -1;
}
function parseHour24(d, string, i) {
var n = numberRe.exec(string.slice(i, i + 2));
return n ? (d.H = +n[0], i + n[0].length) : -1;
}
function parseMinutes(d, string, i) {
var n = numberRe.exec(string.slice(i, i + 2));
return n ? (d.M = +n[0], i + n[0].length) : -1;
}
function parseSeconds(d, string, i) {
var n = numberRe.exec(string.slice(i, i + 2));
return n ? (d.S = +n[0], i + n[0].length) : -1;
}
function parseMilliseconds(d, string, i) {
var n = numberRe.exec(string.slice(i, i + 3));
return n ? (d.L = +n[0], i + n[0].length) : -1;
}
function parseLiteralPercent(d, string, i) {
var n = percentRe.exec(string.slice(i, i + 1));
return n ? i + n[0].length : -1;
}
function formatDayOfMonth(d, p) {
return pad(d.getDate(), p, 2);
}
function formatHour24(d, p) {
return pad(d.getHours(), p, 2);
}
function formatHour12(d, p) {
return pad(d.getHours() % 12 || 12, p, 2);
}
function formatDayOfYear(d, p) {
return pad(1 + day.count(year(d), d), p, 3);
}
function formatMilliseconds(d, p) {
return pad(d.getMilliseconds(), p, 3);
}
function formatMonthNumber(d, p) {
return pad(d.getMonth() + 1, p, 2);
}
function formatMinutes(d, p) {
return pad(d.getMinutes(), p, 2);
}
function formatSeconds(d, p) {
return pad(d.getSeconds(), p, 2);
}
function formatWeekNumberSunday(d, p) {
return pad(sunday.count(year(d), d), p, 2);
}
function formatWeekdayNumber(d) {
return d.getDay();
}
function formatWeekNumberMonday(d, p) {
return pad(monday.count(year(d), d), p, 2);
}
function formatYear(d, p) {
return pad(d.getFullYear() % 100, p, 2);
}
function formatFullYear(d, p) {
return pad(d.getFullYear() % 10000, p, 4);
}
function formatZone(d) {
var z = d.getTimezoneOffset();
return (z > 0 ? "-" : (z *= -1, "+"))
+ pad(z / 60 | 0, "0", 2)
+ pad(z % 60, "0", 2);
}
function formatUTCDayOfMonth(d, p) {
return pad(d.getUTCDate(), p, 2);
}
function formatUTCHour24(d, p) {
return pad(d.getUTCHours(), p, 2);
}
function formatUTCHour12(d, p) {
return pad(d.getUTCHours() % 12 || 12, p, 2);
}
function formatUTCDayOfYear(d, p) {
return pad(1 + utcDay.count(utcYear(d), d), p, 3);
}
function formatUTCMilliseconds(d, p) {
return pad(d.getUTCMilliseconds(), p, 3);
}
function formatUTCMonthNumber(d, p) {
return pad(d.getUTCMonth() + 1, p, 2);
}
function formatUTCMinutes(d, p) {
return pad(d.getUTCMinutes(), p, 2);
}
function formatUTCSeconds(d, p) {
return pad(d.getUTCSeconds(), p, 2);
}
function formatUTCWeekNumberSunday(d, p) {
return pad(utcSunday.count(utcYear(d), d), p, 2);
}
function formatUTCWeekdayNumber(d) {
return d.getUTCDay();
}
function formatUTCWeekNumberMonday(d, p) {
return pad(utcMonday.count(utcYear(d), d), p, 2);
}
function formatUTCYear(d, p) {
return pad(d.getUTCFullYear() % 100, p, 2);
}
function formatUTCFullYear(d, p) {
return pad(d.getUTCFullYear() % 10000, p, 4);
}
function formatUTCZone() {
return "+0000";
}
function formatLiteralPercent() {
return "%";
}
var locale$2;
defaultLocale$1({
dateTime: "%x, %X",
date: "%-m/%-d/%Y",
time: "%-I:%M:%S %p",
periods: ["AM", "PM"],
days: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"],
shortDays: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"],
months: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"],
shortMonths: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
});
function defaultLocale$1(definition) {
locale$2 = formatLocale$1(definition);
exports.timeFormat = locale$2.format;
exports.timeParse = locale$2.parse;
exports.utcFormat = locale$2.utcFormat;
exports.utcParse = locale$2.utcParse;
return locale$2;
}
var isoSpecifier = "%Y-%m-%dT%H:%M:%S.%LZ";
function formatIsoNative(date) {
return date.toISOString();
}
var formatIso = Date.prototype.toISOString
? formatIsoNative
: exports.utcFormat(isoSpecifier);
function parseIsoNative(string) {
var date = new Date(string);
return isNaN(date) ? null : date;
}
var parseIso = +new Date("2000-01-01T00:00:00.000Z")
? parseIsoNative
: exports.utcParse(isoSpecifier);
var durationSecond = 1000;
var durationMinute = durationSecond * 60;
var durationHour = durationMinute * 60;
var durationDay = durationHour * 24;
var durationWeek = durationDay * 7;
var durationMonth = durationDay * 30;
var durationYear = durationDay * 365;
function date$1(t) {
return new Date(t);
}
function number$2(t) {
return t instanceof Date ? +t : +new Date(+t);
}
function calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1, millisecond$$1, format) {
var scale = continuous(deinterpolateLinear, reinterpolate),
invert = scale.invert,
domain = scale.domain;
var formatMillisecond = format(".%L"),
formatSecond = format(":%S"),
formatMinute = format("%I:%M"),
formatHour = format("%I %p"),
formatDay = format("%a %d"),
formatWeek = format("%b %d"),
formatMonth = format("%B"),
formatYear = format("%Y");
var tickIntervals = [
[second$$1, 1, durationSecond],
[second$$1, 5, 5 * durationSecond],
[second$$1, 15, 15 * durationSecond],
[second$$1, 30, 30 * durationSecond],
[minute$$1, 1, durationMinute],
[minute$$1, 5, 5 * durationMinute],
[minute$$1, 15, 15 * durationMinute],
[minute$$1, 30, 30 * durationMinute],
[ hour$$1, 1, durationHour ],
[ hour$$1, 3, 3 * durationHour ],
[ hour$$1, 6, 6 * durationHour ],
[ hour$$1, 12, 12 * durationHour ],
[ day$$1, 1, durationDay ],
[ day$$1, 2, 2 * durationDay ],
[ week, 1, durationWeek ],
[ month$$1, 1, durationMonth ],
[ month$$1, 3, 3 * durationMonth ],
[ year$$1, 1, durationYear ]
];
function tickFormat(date) {
return (second$$1(date) < date ? formatMillisecond
: minute$$1(date) < date ? formatSecond
: hour$$1(date) < date ? formatMinute
: day$$1(date) < date ? formatHour
: month$$1(date) < date ? (week(date) < date ? formatDay : formatWeek)
: year$$1(date) < date ? formatMonth
: formatYear)(date);
}
function tickInterval(interval, start, stop, step) {
if (interval == null) interval = 10;
// If a desired tick count is specified, pick a reasonable tick interval
// based on the extent of the domain and a rough estimate of tick size.
// Otherwise, assume interval is already a time interval and use it.
if (typeof interval === "number") {
var target = Math.abs(stop - start) / interval,
i = bisector(function(i) { return i[2]; }).right(tickIntervals, target);
if (i === tickIntervals.length) {
step = tickStep(start / durationYear, stop / durationYear, interval);
interval = year$$1;
} else if (i) {
i = tickIntervals[target / tickIntervals[i - 1][2] < tickIntervals[i][2] / target ? i - 1 : i];
step = i[1];
interval = i[0];
} else {
step = tickStep(start, stop, interval);
interval = millisecond$$1;
}
}
return step == null ? interval : interval.every(step);
}
scale.invert = function(y) {
return new Date(invert(y));
};
scale.domain = function(_) {
return arguments.length ? domain(map$3.call(_, number$2)) : domain().map(date$1);
};
scale.ticks = function(interval, step) {
var d = domain(),
t0 = d[0],
t1 = d[d.length - 1],
r = t1 < t0,
t;
if (r) t = t0, t0 = t1, t1 = t;
t = tickInterval(interval, t0, t1, step);
t = t ? t.range(t0, t1 + 1) : []; // inclusive stop
return r ? t.reverse() : t;
};
scale.tickFormat = function(count, specifier) {
return specifier == null ? tickFormat : format(specifier);
};
scale.nice = function(interval, step) {
var d = domain();
return (interval = tickInterval(interval, d[0], d[d.length - 1], step))
? domain(nice(d, interval))
: scale;
};
scale.copy = function() {
return copy(scale, calendar(year$$1, month$$1, week, day$$1, hour$$1, minute$$1, second$$1, millisecond$$1, format));
};
return scale;
}
var time = function() {
return calendar(year, month, sunday, day, hour, minute, second, millisecond, exports.timeFormat).domain([new Date(2000, 0, 1), new Date(2000, 0, 2)]);
};
var utcTime = function() {
return calendar(utcYear, utcMonth, utcSunday, utcDay, utcHour, utcMinute, second, millisecond, exports.utcFormat).domain([Date.UTC(2000, 0, 1), Date.UTC(2000, 0, 2)]);
};
var colors = function(s) {
return s.match(/.{6}/g).map(function(x) {
return "#" + x;
});
};
var category10 = colors("1f77b4ff7f0e2ca02cd627289467bd8c564be377c27f7f7fbcbd2217becf");
var category20b = colors("393b795254a36b6ecf9c9ede6379398ca252b5cf6bcedb9c8c6d31bd9e39e7ba52e7cb94843c39ad494ad6616be7969c7b4173a55194ce6dbdde9ed6");
var category20c = colors("3182bd6baed69ecae1c6dbefe6550dfd8d3cfdae6bfdd0a231a35474c476a1d99bc7e9c0756bb19e9ac8bcbddcdadaeb636363969696bdbdbdd9d9d9");
var category20 = colors("1f77b4aec7e8ff7f0effbb782ca02c98df8ad62728ff98969467bdc5b0d58c564bc49c94e377c2f7b6d27f7f7fc7c7c7bcbd22dbdb8d17becf9edae5");
var cubehelix$3 = cubehelixLong(cubehelix(300, 0.5, 0.0), cubehelix(-240, 0.5, 1.0));
var warm = cubehelixLong(cubehelix(-100, 0.75, 0.35), cubehelix(80, 1.50, 0.8));
var cool = cubehelixLong(cubehelix(260, 0.75, 0.35), cubehelix(80, 1.50, 0.8));
var rainbow = cubehelix();
var rainbow$1 = function(t) {
if (t < 0 || t > 1) t -= Math.floor(t);
var ts = Math.abs(t - 0.5);
rainbow.h = 360 * t - 100;
rainbow.s = 1.5 - 1.5 * ts;
rainbow.l = 0.8 - 0.9 * ts;
return rainbow + "";
};
function ramp(range) {
var n = range.length;
return function(t) {
return range[Math.max(0, Math.min(n - 1, Math.floor(t * n)))];
};
}
var viridis = ramp(colors("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"));
var magma = ramp(colors("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"));
var inferno = ramp(colors("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"));
var plasma = ramp(colors("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"));
function sequential(interpolator) {
var x0 = 0,
x1 = 1,
clamp = false;
function scale(x) {
var t = (x - x0) / (x1 - x0);
return interpolator(clamp ? Math.max(0, Math.min(1, t)) : t);
}
scale.domain = function(_) {
return arguments.length ? (x0 = +_[0], x1 = +_[1], scale) : [x0, x1];
};
scale.clamp = function(_) {
return arguments.length ? (clamp = !!_, scale) : clamp;
};
scale.interpolator = function(_) {
return arguments.length ? (interpolator = _, scale) : interpolator;
};
scale.copy = function() {
return sequential(interpolator).domain([x0, x1]).clamp(clamp);
};
return linearish(scale);
}
var constant$10 = function(x) {
return function constant() {
return x;
};
};
var abs$1 = Math.abs;
var atan2$1 = Math.atan2;
var cos$2 = Math.cos;
var max$2 = Math.max;
var min$1 = Math.min;
var sin$2 = Math.sin;
var sqrt$2 = Math.sqrt;
var epsilon$3 = 1e-12;
var pi$4 = Math.PI;
var halfPi$3 = pi$4 / 2;
var tau$4 = 2 * pi$4;
function acos$1(x) {
return x > 1 ? 0 : x < -1 ? pi$4 : Math.acos(x);
}
function asin$1(x) {
return x >= 1 ? halfPi$3 : x <= -1 ? -halfPi$3 : Math.asin(x);
}
function arcInnerRadius(d) {
return d.innerRadius;
}
function arcOuterRadius(d) {
return d.outerRadius;
}
function arcStartAngle(d) {
return d.startAngle;
}
function arcEndAngle(d) {
return d.endAngle;
}
function arcPadAngle(d) {
return d && d.padAngle; // Note: optional!
}
function intersect(x0, y0, x1, y1, x2, y2, x3, y3) {
var x10 = x1 - x0, y10 = y1 - y0,
x32 = x3 - x2, y32 = y3 - y2,
t = (x32 * (y0 - y2) - y32 * (x0 - x2)) / (y32 * x10 - x32 * y10);
return [x0 + t * x10, y0 + t * y10];
}
// Compute perpendicular offset line of length rc.
// http://mathworld.wolfram.com/Circle-LineIntersection.html
function cornerTangents(x0, y0, x1, y1, r1, rc, cw) {
var x01 = x0 - x1,
y01 = y0 - y1,
lo = (cw ? rc : -rc) / sqrt$2(x01 * x01 + y01 * y01),
ox = lo * y01,
oy = -lo * x01,
x11 = x0 + ox,
y11 = y0 + oy,
x10 = x1 + ox,
y10 = y1 + oy,
x00 = (x11 + x10) / 2,
y00 = (y11 + y10) / 2,
dx = x10 - x11,
dy = y10 - y11,
d2 = dx * dx + dy * dy,
r = r1 - rc,
D = x11 * y10 - x10 * y11,
d = (dy < 0 ? -1 : 1) * sqrt$2(max$2(0, r * r * d2 - D * D)),
cx0 = (D * dy - dx * d) / d2,
cy0 = (-D * dx - dy * d) / d2,
cx1 = (D * dy + dx * d) / d2,
cy1 = (-D * dx + dy * d) / d2,
dx0 = cx0 - x00,
dy0 = cy0 - y00,
dx1 = cx1 - x00,
dy1 = cy1 - y00;
// Pick the closer of the two intersection points.
// TODO Is there a faster way to determine which intersection to use?
if (dx0 * dx0 + dy0 * dy0 > dx1 * dx1 + dy1 * dy1) cx0 = cx1, cy0 = cy1;
return {
cx: cx0,
cy: cy0,
x01: -ox,
y01: -oy,
x11: cx0 * (r1 / r - 1),
y11: cy0 * (r1 / r - 1)
};
}
var arc = function() {
var innerRadius = arcInnerRadius,
outerRadius = arcOuterRadius,
cornerRadius = constant$10(0),
padRadius = null,
startAngle = arcStartAngle,
endAngle = arcEndAngle,
padAngle = arcPadAngle,
context = null;
function arc() {
var buffer,
r,
r0 = +innerRadius.apply(this, arguments),
r1 = +outerRadius.apply(this, arguments),
a0 = startAngle.apply(this, arguments) - halfPi$3,
a1 = endAngle.apply(this, arguments) - halfPi$3,
da = abs$1(a1 - a0),
cw = a1 > a0;
if (!context) context = buffer = path();
// Ensure that the outer radius is always larger than the inner radius.
if (r1 < r0) r = r1, r1 = r0, r0 = r;
// Is it a point?
if (!(r1 > epsilon$3)) context.moveTo(0, 0);
// Or is it a circle or annulus?
else if (da > tau$4 - epsilon$3) {
context.moveTo(r1 * cos$2(a0), r1 * sin$2(a0));
context.arc(0, 0, r1, a0, a1, !cw);
if (r0 > epsilon$3) {
context.moveTo(r0 * cos$2(a1), r0 * sin$2(a1));
context.arc(0, 0, r0, a1, a0, cw);
}
}
// Or is it a circular or annular sector?
else {
var a01 = a0,
a11 = a1,
a00 = a0,
a10 = a1,
da0 = da,
da1 = da,
ap = padAngle.apply(this, arguments) / 2,
rp = (ap > epsilon$3) && (padRadius ? +padRadius.apply(this, arguments) : sqrt$2(r0 * r0 + r1 * r1)),
rc = min$1(abs$1(r1 - r0) / 2, +cornerRadius.apply(this, arguments)),
rc0 = rc,
rc1 = rc,
t0,
t1;
// Apply padding? Note that since r1 ≥ r0, da1 ≥ da0.
if (rp > epsilon$3) {
var p0 = asin$1(rp / r0 * sin$2(ap)),
p1 = asin$1(rp / r1 * sin$2(ap));
if ((da0 -= p0 * 2) > epsilon$3) p0 *= (cw ? 1 : -1), a00 += p0, a10 -= p0;
else da0 = 0, a00 = a10 = (a0 + a1) / 2;
if ((da1 -= p1 * 2) > epsilon$3) p1 *= (cw ? 1 : -1), a01 += p1, a11 -= p1;
else da1 = 0, a01 = a11 = (a0 + a1) / 2;
}
var x01 = r1 * cos$2(a01),
y01 = r1 * sin$2(a01),
x10 = r0 * cos$2(a10),
y10 = r0 * sin$2(a10);
// Apply rounded corners?
if (rc > epsilon$3) {
var x11 = r1 * cos$2(a11),
y11 = r1 * sin$2(a11),
x00 = r0 * cos$2(a00),
y00 = r0 * sin$2(a00);
// Restrict the corner radius according to the sector angle.
if (da < pi$4) {
var oc = da0 > epsilon$3 ? intersect(x01, y01, x00, y00, x11, y11, x10, y10) : [x10, y10],
ax = x01 - oc[0],
ay = y01 - oc[1],
bx = x11 - oc[0],
by = y11 - oc[1],
kc = 1 / sin$2(acos$1((ax * bx + ay * by) / (sqrt$2(ax * ax + ay * ay) * sqrt$2(bx * bx + by * by))) / 2),
lc = sqrt$2(oc[0] * oc[0] + oc[1] * oc[1]);
rc0 = min$1(rc, (r0 - lc) / (kc - 1));
rc1 = min$1(rc, (r1 - lc) / (kc + 1));
}
}
// Is the sector collapsed to a line?
if (!(da1 > epsilon$3)) context.moveTo(x01, y01);
// Does the sector’s outer ring have rounded corners?
else if (rc1 > epsilon$3) {
t0 = cornerTangents(x00, y00, x01, y01, r1, rc1, cw);
t1 = cornerTangents(x11, y11, x10, y10, r1, rc1, cw);
context.moveTo(t0.cx + t0.x01, t0.cy + t0.y01);
// Have the corners merged?
if (rc1 < rc) context.arc(t0.cx, t0.cy, rc1, atan2$1(t0.y01, t0.x01), atan2$1(t1.y01, t1.x01), !cw);
// Otherwise, draw the two corners and the ring.
else {
context.arc(t0.cx, t0.cy, rc1, atan2$1(t0.y01, t0.x01), atan2$1(t0.y11, t0.x11), !cw);
context.arc(0, 0, r1, atan2$1(t0.cy + t0.y11, t0.cx + t0.x11), atan2$1(t1.cy + t1.y11, t1.cx + t1.x11), !cw);
context.arc(t1.cx, t1.cy, rc1, atan2$1(t1.y11, t1.x11), atan2$1(t1.y01, t1.x01), !cw);
}
}
// Or is the outer ring just a circular arc?
else context.moveTo(x01, y01), context.arc(0, 0, r1, a01, a11, !cw);
// Is there no inner ring, and it’s a circular sector?
// Or perhaps it’s an annular sector collapsed due to padding?
if (!(r0 > epsilon$3) || !(da0 > epsilon$3)) context.lineTo(x10, y10);
// Does the sector’s inner ring (or point) have rounded corners?
else if (rc0 > epsilon$3) {
t0 = cornerTangents(x10, y10, x11, y11, r0, -rc0, cw);
t1 = cornerTangents(x01, y01, x00, y00, r0, -rc0, cw);
context.lineTo(t0.cx + t0.x01, t0.cy + t0.y01);
// Have the corners merged?
if (rc0 < rc) context.arc(t0.cx, t0.cy, rc0, atan2$1(t0.y01, t0.x01), atan2$1(t1.y01, t1.x01), !cw);
// Otherwise, draw the two corners and the ring.
else {
context.arc(t0.cx, t0.cy, rc0, atan2$1(t0.y01, t0.x01), atan2$1(t0.y11, t0.x11), !cw);
context.arc(0, 0, r0, atan2$1(t0.cy + t0.y11, t0.cx + t0.x11), atan2$1(t1.cy + t1.y11, t1.cx + t1.x11), cw);
context.arc(t1.cx, t1.cy, rc0, atan2$1(t1.y11, t1.x11), atan2$1(t1.y01, t1.x01), !cw);
}
}
// Or is the inner ring just a circular arc?
else context.arc(0, 0, r0, a10, a00, cw);
}
context.closePath();
if (buffer) return context = null, buffer + "" || null;
}
arc.centroid = function() {
var r = (+innerRadius.apply(this, arguments) + +outerRadius.apply(this, arguments)) / 2,
a = (+startAngle.apply(this, arguments) + +endAngle.apply(this, arguments)) / 2 - pi$4 / 2;
return [cos$2(a) * r, sin$2(a) * r];
};
arc.innerRadius = function(_) {
return arguments.length ? (innerRadius = typeof _ === "function" ? _ : constant$10(+_), arc) : innerRadius;
};
arc.outerRadius = function(_) {
return arguments.length ? (outerRadius = typeof _ === "function" ? _ : constant$10(+_), arc) : outerRadius;
};
arc.cornerRadius = function(_) {
return arguments.length ? (cornerRadius = typeof _ === "function" ? _ : constant$10(+_), arc) : cornerRadius;
};
arc.padRadius = function(_) {
return arguments.length ? (padRadius = _ == null ? null : typeof _ === "function" ? _ : constant$10(+_), arc) : padRadius;
};
arc.startAngle = function(_) {
return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$10(+_), arc) : startAngle;
};
arc.endAngle = function(_) {
return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$10(+_), arc) : endAngle;
};
arc.padAngle = function(_) {
return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant$10(+_), arc) : padAngle;
};
arc.context = function(_) {
return arguments.length ? ((context = _ == null ? null : _), arc) : context;
};
return arc;
};
function Linear(context) {
this._context = context;
}
Linear.prototype = {
areaStart: function() {
this._line = 0;
},
areaEnd: function() {
this._line = NaN;
},
lineStart: function() {
this._point = 0;
},
lineEnd: function() {
if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
this._line = 1 - this._line;
},
point: function(x, y) {
x = +x, y = +y;
switch (this._point) {
case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
case 1: this._point = 2; // proceed
default: this._context.lineTo(x, y); break;
}
}
};
var curveLinear = function(context) {
return new Linear(context);
};
function x$3(p) {
return p[0];
}
function y$3(p) {
return p[1];
}
var line = function() {
var x$$1 = x$3,
y$$1 = y$3,
defined = constant$10(true),
context = null,
curve = curveLinear,
output = null;
function line(data) {
var i,
n = data.length,
d,
defined0 = false,
buffer;
if (context == null) output = curve(buffer = path());
for (i = 0; i <= n; ++i) {
if (!(i < n && defined(d = data[i], i, data)) === defined0) {
if (defined0 = !defined0) output.lineStart();
else output.lineEnd();
}
if (defined0) output.point(+x$$1(d, i, data), +y$$1(d, i, data));
}
if (buffer) return output = null, buffer + "" || null;
}
line.x = function(_) {
return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$10(+_), line) : x$$1;
};
line.y = function(_) {
return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$10(+_), line) : y$$1;
};
line.defined = function(_) {
return arguments.length ? (defined = typeof _ === "function" ? _ : constant$10(!!_), line) : defined;
};
line.curve = function(_) {
return arguments.length ? (curve = _, context != null && (output = curve(context)), line) : curve;
};
line.context = function(_) {
return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), line) : context;
};
return line;
};
var area$2 = function() {
var x0 = x$3,
x1 = null,
y0 = constant$10(0),
y1 = y$3,
defined = constant$10(true),
context = null,
curve = curveLinear,
output = null;
function area(data) {
var i,
j,
k,
n = data.length,
d,
defined0 = false,
buffer,
x0z = new Array(n),
y0z = new Array(n);
if (context == null) output = curve(buffer = path());
for (i = 0; i <= n; ++i) {
if (!(i < n && defined(d = data[i], i, data)) === defined0) {
if (defined0 = !defined0) {
j = i;
output.areaStart();
output.lineStart();
} else {
output.lineEnd();
output.lineStart();
for (k = i - 1; k >= j; --k) {
output.point(x0z[k], y0z[k]);
}
output.lineEnd();
output.areaEnd();
}
}
if (defined0) {
x0z[i] = +x0(d, i, data), y0z[i] = +y0(d, i, data);
output.point(x1 ? +x1(d, i, data) : x0z[i], y1 ? +y1(d, i, data) : y0z[i]);
}
}
if (buffer) return output = null, buffer + "" || null;
}
function arealine() {
return line().defined(defined).curve(curve).context(context);
}
area.x = function(_) {
return arguments.length ? (x0 = typeof _ === "function" ? _ : constant$10(+_), x1 = null, area) : x0;
};
area.x0 = function(_) {
return arguments.length ? (x0 = typeof _ === "function" ? _ : constant$10(+_), area) : x0;
};
area.x1 = function(_) {
return arguments.length ? (x1 = _ == null ? null : typeof _ === "function" ? _ : constant$10(+_), area) : x1;
};
area.y = function(_) {
return arguments.length ? (y0 = typeof _ === "function" ? _ : constant$10(+_), y1 = null, area) : y0;
};
area.y0 = function(_) {
return arguments.length ? (y0 = typeof _ === "function" ? _ : constant$10(+_), area) : y0;
};
area.y1 = function(_) {
return arguments.length ? (y1 = _ == null ? null : typeof _ === "function" ? _ : constant$10(+_), area) : y1;
};
area.lineX0 =
area.lineY0 = function() {
return arealine().x(x0).y(y0);
};
area.lineY1 = function() {
return arealine().x(x0).y(y1);
};
area.lineX1 = function() {
return arealine().x(x1).y(y0);
};
area.defined = function(_) {
return arguments.length ? (defined = typeof _ === "function" ? _ : constant$10(!!_), area) : defined;
};
area.curve = function(_) {
return arguments.length ? (curve = _, context != null && (output = curve(context)), area) : curve;
};
area.context = function(_) {
return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), area) : context;
};
return area;
};
var descending$1 = function(a, b) {
return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
};
var identity$7 = function(d) {
return d;
};
var pie = function() {
var value = identity$7,
sortValues = descending$1,
sort = null,
startAngle = constant$10(0),
endAngle = constant$10(tau$4),
padAngle = constant$10(0);
function pie(data) {
var i,
n = data.length,
j,
k,
sum = 0,
index = new Array(n),
arcs = new Array(n),
a0 = +startAngle.apply(this, arguments),
da = Math.min(tau$4, Math.max(-tau$4, endAngle.apply(this, arguments) - a0)),
a1,
p = Math.min(Math.abs(da) / n, padAngle.apply(this, arguments)),
pa = p * (da < 0 ? -1 : 1),
v;
for (i = 0; i < n; ++i) {
if ((v = arcs[index[i] = i] = +value(data[i], i, data)) > 0) {
sum += v;
}
}
// Optionally sort the arcs by previously-computed values or by data.
if (sortValues != null) index.sort(function(i, j) { return sortValues(arcs[i], arcs[j]); });
else if (sort != null) index.sort(function(i, j) { return sort(data[i], data[j]); });
// Compute the arcs! They are stored in the original data's order.
for (i = 0, k = sum ? (da - n * pa) / sum : 0; i < n; ++i, a0 = a1) {
j = index[i], v = arcs[j], a1 = a0 + (v > 0 ? v * k : 0) + pa, arcs[j] = {
data: data[j],
index: i,
value: v,
startAngle: a0,
endAngle: a1,
padAngle: p
};
}
return arcs;
}
pie.value = function(_) {
return arguments.length ? (value = typeof _ === "function" ? _ : constant$10(+_), pie) : value;
};
pie.sortValues = function(_) {
return arguments.length ? (sortValues = _, sort = null, pie) : sortValues;
};
pie.sort = function(_) {
return arguments.length ? (sort = _, sortValues = null, pie) : sort;
};
pie.startAngle = function(_) {
return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant$10(+_), pie) : startAngle;
};
pie.endAngle = function(_) {
return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant$10(+_), pie) : endAngle;
};
pie.padAngle = function(_) {
return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant$10(+_), pie) : padAngle;
};
return pie;
};
var curveRadialLinear = curveRadial(curveLinear);
function Radial(curve) {
this._curve = curve;
}
Radial.prototype = {
areaStart: function() {
this._curve.areaStart();
},
areaEnd: function() {
this._curve.areaEnd();
},
lineStart: function() {
this._curve.lineStart();
},
lineEnd: function() {
this._curve.lineEnd();
},
point: function(a, r) {
this._curve.point(r * Math.sin(a), r * -Math.cos(a));
}
};
function curveRadial(curve) {
function radial(context) {
return new Radial(curve(context));
}
radial._curve = curve;
return radial;
}
function radialLine(l) {
var c = l.curve;
l.angle = l.x, delete l.x;
l.radius = l.y, delete l.y;
l.curve = function(_) {
return arguments.length ? c(curveRadial(_)) : c()._curve;
};
return l;
}
var radialLine$1 = function() {
return radialLine(line().curve(curveRadialLinear));
};
var radialArea = function() {
var a = area$2().curve(curveRadialLinear),
c = a.curve,
x0 = a.lineX0,
x1 = a.lineX1,
y0 = a.lineY0,
y1 = a.lineY1;
a.angle = a.x, delete a.x;
a.startAngle = a.x0, delete a.x0;
a.endAngle = a.x1, delete a.x1;
a.radius = a.y, delete a.y;
a.innerRadius = a.y0, delete a.y0;
a.outerRadius = a.y1, delete a.y1;
a.lineStartAngle = function() { return radialLine(x0()); }, delete a.lineX0;
a.lineEndAngle = function() { return radialLine(x1()); }, delete a.lineX1;
a.lineInnerRadius = function() { return radialLine(y0()); }, delete a.lineY0;
a.lineOuterRadius = function() { return radialLine(y1()); }, delete a.lineY1;
a.curve = function(_) {
return arguments.length ? c(curveRadial(_)) : c()._curve;
};
return a;
};
var slice$5 = Array.prototype.slice;
var radialPoint = function(x, y) {
return [(y = +y) * Math.cos(x -= Math.PI / 2), y * Math.sin(x)];
};
function linkSource(d) {
return d.source;
}
function linkTarget(d) {
return d.target;
}
function link$2(curve) {
var source = linkSource,
target = linkTarget,
x$$1 = x$3,
y$$1 = y$3,
context = null;
function link() {
var buffer, argv = slice$5.call(arguments), s = source.apply(this, argv), t = target.apply(this, argv);
if (!context) context = buffer = path();
curve(context, +x$$1.apply(this, (argv[0] = s, argv)), +y$$1.apply(this, argv), +x$$1.apply(this, (argv[0] = t, argv)), +y$$1.apply(this, argv));
if (buffer) return context = null, buffer + "" || null;
}
link.source = function(_) {
return arguments.length ? (source = _, link) : source;
};
link.target = function(_) {
return arguments.length ? (target = _, link) : target;
};
link.x = function(_) {
return arguments.length ? (x$$1 = typeof _ === "function" ? _ : constant$10(+_), link) : x$$1;
};
link.y = function(_) {
return arguments.length ? (y$$1 = typeof _ === "function" ? _ : constant$10(+_), link) : y$$1;
};
link.context = function(_) {
return arguments.length ? ((context = _ == null ? null : _), link) : context;
};
return link;
}
function curveHorizontal(context, x0, y0, x1, y1) {
context.moveTo(x0, y0);
context.bezierCurveTo(x0 = (x0 + x1) / 2, y0, x0, y1, x1, y1);
}
function curveVertical(context, x0, y0, x1, y1) {
context.moveTo(x0, y0);
context.bezierCurveTo(x0, y0 = (y0 + y1) / 2, x1, y0, x1, y1);
}
function curveRadial$1(context, x0, y0, x1, y1) {
var p0 = radialPoint(x0, y0),
p1 = radialPoint(x0, y0 = (y0 + y1) / 2),
p2 = radialPoint(x1, y0),
p3 = radialPoint(x1, y1);
context.moveTo(p0[0], p0[1]);
context.bezierCurveTo(p1[0], p1[1], p2[0], p2[1], p3[0], p3[1]);
}
function linkHorizontal() {
return link$2(curveHorizontal);
}
function linkVertical() {
return link$2(curveVertical);
}
function linkRadial() {
var l = link$2(curveRadial$1);
l.angle = l.x, delete l.x;
l.radius = l.y, delete l.y;
return l;
}
var circle$2 = {
draw: function(context, size) {
var r = Math.sqrt(size / pi$4);
context.moveTo(r, 0);
context.arc(0, 0, r, 0, tau$4);
}
};
var cross$2 = {
draw: function(context, size) {
var r = Math.sqrt(size / 5) / 2;
context.moveTo(-3 * r, -r);
context.lineTo(-r, -r);
context.lineTo(-r, -3 * r);
context.lineTo(r, -3 * r);
context.lineTo(r, -r);
context.lineTo(3 * r, -r);
context.lineTo(3 * r, r);
context.lineTo(r, r);
context.lineTo(r, 3 * r);
context.lineTo(-r, 3 * r);
context.lineTo(-r, r);
context.lineTo(-3 * r, r);
context.closePath();
}
};
var tan30 = Math.sqrt(1 / 3);
var tan30_2 = tan30 * 2;
var diamond = {
draw: function(context, size) {
var y = Math.sqrt(size / tan30_2),
x = y * tan30;
context.moveTo(0, -y);
context.lineTo(x, 0);
context.lineTo(0, y);
context.lineTo(-x, 0);
context.closePath();
}
};
var ka = 0.89081309152928522810;
var kr = Math.sin(pi$4 / 10) / Math.sin(7 * pi$4 / 10);
var kx = Math.sin(tau$4
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